/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-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 15:11:02,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 15:11:02,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 15:11:02,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 15:11:02,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 15:11:02,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 15:11:02,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 15:11:02,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 15:11:02,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 15:11:02,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 15:11:02,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 15:11:02,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 15:11:02,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 15:11:02,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 15:11:02,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 15:11:02,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 15:11:02,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 15:11:02,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 15:11:02,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 15:11:02,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 15:11:02,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 15:11:02,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 15:11:02,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 15:11:02,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 15:11:02,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-11 15:11:02,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 15:11:02,752 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 15:11:02,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 15:11:02,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 15:11:02,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 15:11:02,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 15:11:02,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 15:11:02,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 15:11:02,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 15:11:02,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 15:11:02,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 15:11:02,761 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 15:11:02,817 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 15:11:02,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 15:11:02,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 15:11:02,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 15:11:02,822 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 15:11:02,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 15:11:02,823 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 15:11:02,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 15:11:02,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 15:11:02,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 15:11:02,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 15:11:02,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 15:11:02,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 15:11:02,826 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 15:11:02,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 15:11:02,826 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 15:11:02,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 15:11:02,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 15:11:02,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 15:11:02,827 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 15:11:02,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 15:11:02,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 15:11:02,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 15:11:02,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 15:11:02,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 15:11:02,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 15:11:02,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 15:11:02,829 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-11 15:11:02,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 15:11:02,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 15:11:03,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 15:11:03,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 15:11:03,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 15:11:03,250 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 15:11:03,250 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 15:11:03,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-11-11 15:11:03,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57cea6b29/4cf29980ffa74d6a8b1906d309257108/FLAG4235328e8 [2020-11-11 15:11:03,999 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 15:11:04,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-11-11 15:11:04,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57cea6b29/4cf29980ffa74d6a8b1906d309257108/FLAG4235328e8 [2020-11-11 15:11:04,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57cea6b29/4cf29980ffa74d6a8b1906d309257108 [2020-11-11 15:11:04,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 15:11:04,327 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 15:11:04,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 15:11:04,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 15:11:04,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 15:11:04,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:11:04" (1/1) ... [2020-11-11 15:11:04,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@359ac608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:04, skipping insertion in model container [2020-11-11 15:11:04,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 03:11:04" (1/1) ... [2020-11-11 15:11:04,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 15:11:04,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 15:11:04,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 15:11:04,852 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 15:11:04,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 15:11:05,030 INFO L208 MainTranslator]: Completed translation [2020-11-11 15:11:05,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:05 WrapperNode [2020-11-11 15:11:05,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 15:11:05,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 15:11:05,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 15:11:05,033 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 15:11:05,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:05" (1/1) ... [2020-11-11 15:11:05,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:05" (1/1) ... [2020-11-11 15:11:05,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 15:11:05,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 15:11:05,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 15:11:05,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 15:11:05,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:05" (1/1) ... [2020-11-11 15:11:05,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:05" (1/1) ... [2020-11-11 15:11:05,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:05" (1/1) ... [2020-11-11 15:11:05,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:05" (1/1) ... [2020-11-11 15:11:05,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:05" (1/1) ... [2020-11-11 15:11:05,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:05" (1/1) ... [2020-11-11 15:11:05,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:05" (1/1) ... [2020-11-11 15:11:05,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 15:11:05,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 15:11:05,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 15:11:05,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 15:11:05,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:05" (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 15:11:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-11 15:11:05,265 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-11 15:11:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-11 15:11:05,265 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-11 15:11:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 15:11:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 15:11:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 15:11:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 15:11:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 15:11:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 15:11:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 15:11:05,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 15:11:05,271 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 15:11:05,735 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 15:11:05,735 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-11 15:11:05,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:11:05 BoogieIcfgContainer [2020-11-11 15:11:05,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 15:11:05,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 15:11:05,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 15:11:05,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 15:11:05,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 03:11:04" (1/3) ... [2020-11-11 15:11:05,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa5ce00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:11:05, skipping insertion in model container [2020-11-11 15:11:05,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 03:11:05" (2/3) ... [2020-11-11 15:11:05,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa5ce00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 03:11:05, skipping insertion in model container [2020-11-11 15:11:05,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 03:11:05" (3/3) ... [2020-11-11 15:11:05,748 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-11-11 15:11:05,765 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 15:11:05,765 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 15:11:05,769 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 15:11:05,770 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 15:11:05,820 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,820 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,820 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,821 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,821 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,821 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,822 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,822 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,823 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,823 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,823 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,824 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,825 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,825 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,825 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,825 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,826 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,826 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,826 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,826 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,827 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,827 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,827 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,827 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,827 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,827 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,828 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,828 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,829 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,829 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,829 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,830 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,830 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,830 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,830 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,830 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,831 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,831 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,832 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,832 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,832 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,833 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,833 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,834 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,836 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,836 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,836 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,837 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,837 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,837 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,838 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,838 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,838 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,838 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,838 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,839 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,841 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,842 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,842 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,842 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,842 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,843 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,852 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,852 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,852 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,852 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,853 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,853 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 15:11:05,860 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 15:11:05,873 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-11 15:11:05,912 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 15:11:05,912 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 15:11:05,912 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 15:11:05,912 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 15:11:05,913 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 15:11:05,913 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 15:11:05,913 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 15:11:05,913 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 15:11:05,930 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 138 flow [2020-11-11 15:11:06,084 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 15:11:06,094 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 15:11:06,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-11 15:11:06,117 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:06,118 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 15:11:06,119 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:06,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:06,137 INFO L82 PathProgramCache]: Analyzing trace with hash 27863943, now seen corresponding path program 1 times [2020-11-11 15:11:06,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:06,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915594424] [2020-11-11 15:11:06,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:06,636 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 15:11:06,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915594424] [2020-11-11 15:11:06,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:06,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:11:06,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214069372] [2020-11-11 15:11:06,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:11:06,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:06,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:11:06,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:11:06,675 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 15:11:06,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:06,903 INFO L93 Difference]: Finished difference Result 3336 states and 9728 transitions. [2020-11-11 15:11:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 15:11:06,906 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 15:11:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:06,934 INFO L225 Difference]: With dead ends: 3336 [2020-11-11 15:11:06,934 INFO L226 Difference]: Without dead ends: 1320 [2020-11-11 15:11:06,936 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 15:11:06,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2020-11-11 15:11:07,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 808. [2020-11-11 15:11:07,059 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 15:11:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2238 transitions. [2020-11-11 15:11:07,066 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2238 transitions. Word has length 28 [2020-11-11 15:11:07,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:07,066 INFO L481 AbstractCegarLoop]: Abstraction has 808 states and 2238 transitions. [2020-11-11 15:11:07,067 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 15:11:07,067 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2238 transitions. [2020-11-11 15:11:07,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-11 15:11:07,071 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:07,071 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 15:11:07,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 15:11:07,072 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:07,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1417635940, now seen corresponding path program 1 times [2020-11-11 15:11:07,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:07,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512891366] [2020-11-11 15:11:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:07,264 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 15:11:07,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512891366] [2020-11-11 15:11:07,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:07,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:11:07,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645243003] [2020-11-11 15:11:07,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:11:07,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:07,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:11:07,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:11:07,269 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 15:11:07,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:07,396 INFO L93 Difference]: Finished difference Result 2107 states and 5756 transitions. [2020-11-11 15:11:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 15:11:07,397 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 15:11:07,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:07,413 INFO L225 Difference]: With dead ends: 2107 [2020-11-11 15:11:07,413 INFO L226 Difference]: Without dead ends: 1851 [2020-11-11 15:11:07,414 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:11:07,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2020-11-11 15:11:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 982. [2020-11-11 15:11:07,470 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 15:11:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2701 transitions. [2020-11-11 15:11:07,478 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2701 transitions. Word has length 32 [2020-11-11 15:11:07,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:07,478 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 2701 transitions. [2020-11-11 15:11:07,479 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 15:11:07,479 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2701 transitions. [2020-11-11 15:11:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-11 15:11:07,482 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:07,482 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 15:11:07,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 15:11:07,483 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:07,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1368897688, now seen corresponding path program 2 times [2020-11-11 15:11:07,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:07,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342740366] [2020-11-11 15:11:07,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:07,694 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 15:11:07,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342740366] [2020-11-11 15:11:07,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:07,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-11 15:11:07,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363813056] [2020-11-11 15:11:07,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 15:11:07,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:07,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 15:11:07,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-11 15:11:07,697 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 15:11:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:07,832 INFO L93 Difference]: Finished difference Result 1227 states and 3221 transitions. [2020-11-11 15:11:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-11 15:11:07,833 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 15:11:07,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:07,840 INFO L225 Difference]: With dead ends: 1227 [2020-11-11 15:11:07,840 INFO L226 Difference]: Without dead ends: 902 [2020-11-11 15:11:07,841 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:07,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2020-11-11 15:11:07,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 810. [2020-11-11 15:11:07,900 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 15:11:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2198 transitions. [2020-11-11 15:11:07,906 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2198 transitions. Word has length 32 [2020-11-11 15:11:07,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:07,906 INFO L481 AbstractCegarLoop]: Abstraction has 810 states and 2198 transitions. [2020-11-11 15:11:07,907 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 15:11:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2198 transitions. [2020-11-11 15:11:07,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:11:07,909 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:07,909 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 15:11:07,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 15:11:07,909 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:07,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:07,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1044457191, now seen corresponding path program 1 times [2020-11-11 15:11:07,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:07,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959129905] [2020-11-11 15:11:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:08,065 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 15:11:08,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959129905] [2020-11-11 15:11:08,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:08,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-11 15:11:08,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979223554] [2020-11-11 15:11:08,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 15:11:08,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:08,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 15:11:08,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-11 15:11:08,069 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 15:11:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:08,234 INFO L93 Difference]: Finished difference Result 1698 states and 4550 transitions. [2020-11-11 15:11:08,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:11:08,235 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 15:11:08,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:08,246 INFO L225 Difference]: With dead ends: 1698 [2020-11-11 15:11:08,246 INFO L226 Difference]: Without dead ends: 1431 [2020-11-11 15:11:08,247 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:08,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2020-11-11 15:11:08,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 855. [2020-11-11 15:11:08,283 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 15:11:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2290 transitions. [2020-11-11 15:11:08,289 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2290 transitions. Word has length 36 [2020-11-11 15:11:08,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:08,289 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 2290 transitions. [2020-11-11 15:11:08,290 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 15:11:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2290 transitions. [2020-11-11 15:11:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:11:08,292 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:08,292 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 15:11:08,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-11 15:11:08,293 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:08,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:08,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2125654229, now seen corresponding path program 2 times [2020-11-11 15:11:08,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:08,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449719661] [2020-11-11 15:11:08,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:08,438 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 15:11:08,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449719661] [2020-11-11 15:11:08,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:08,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:11:08,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62653544] [2020-11-11 15:11:08,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:11:08,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:08,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:11:08,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:11:08,441 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 15:11:08,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:08,636 INFO L93 Difference]: Finished difference Result 1253 states and 3278 transitions. [2020-11-11 15:11:08,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 15:11:08,637 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 15:11:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:08,644 INFO L225 Difference]: With dead ends: 1253 [2020-11-11 15:11:08,644 INFO L226 Difference]: Without dead ends: 1029 [2020-11-11 15:11:08,645 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:08,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2020-11-11 15:11:08,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 899. [2020-11-11 15:11:08,677 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 15:11:08,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2438 transitions. [2020-11-11 15:11:08,682 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2438 transitions. Word has length 36 [2020-11-11 15:11:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:08,683 INFO L481 AbstractCegarLoop]: Abstraction has 899 states and 2438 transitions. [2020-11-11 15:11:08,683 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 15:11:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2438 transitions. [2020-11-11 15:11:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:11:08,685 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:08,685 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 15:11:08,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-11 15:11:08,686 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:08,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:08,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1451531371, now seen corresponding path program 3 times [2020-11-11 15:11:08,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:08,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727913460] [2020-11-11 15:11:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:08,790 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 15:11:08,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727913460] [2020-11-11 15:11:08,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:08,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:11:08,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875135999] [2020-11-11 15:11:08,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:11:08,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:08,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:11:08,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:11:08,793 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 15:11:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:08,953 INFO L93 Difference]: Finished difference Result 2449 states and 6632 transitions. [2020-11-11 15:11:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:11:08,954 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 15:11:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:08,968 INFO L225 Difference]: With dead ends: 2449 [2020-11-11 15:11:08,968 INFO L226 Difference]: Without dead ends: 2182 [2020-11-11 15:11:08,969 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 15:11:08,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2020-11-11 15:11:09,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1005. [2020-11-11 15:11:09,013 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 15:11:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 2785 transitions. [2020-11-11 15:11:09,019 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 2785 transitions. Word has length 36 [2020-11-11 15:11:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:09,019 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 2785 transitions. [2020-11-11 15:11:09,019 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 15:11:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 2785 transitions. [2020-11-11 15:11:09,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-11 15:11:09,021 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:09,021 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 15:11:09,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-11 15:11:09,021 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:09,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:09,022 INFO L82 PathProgramCache]: Analyzing trace with hash 259676583, now seen corresponding path program 4 times [2020-11-11 15:11:09,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:09,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047647905] [2020-11-11 15:11:09,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:09,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:09,165 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 15:11:09,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047647905] [2020-11-11 15:11:09,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 15:11:09,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-11 15:11:09,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871109087] [2020-11-11 15:11:09,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 15:11:09,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:09,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 15:11:09,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-11 15:11:09,168 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 15:11:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:09,370 INFO L93 Difference]: Finished difference Result 1373 states and 3633 transitions. [2020-11-11 15:11:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:11:09,371 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 15:11:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:09,378 INFO L225 Difference]: With dead ends: 1373 [2020-11-11 15:11:09,378 INFO L226 Difference]: Without dead ends: 1037 [2020-11-11 15:11:09,379 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:09,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2020-11-11 15:11:09,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 932. [2020-11-11 15:11:09,434 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 15:11:09,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 2551 transitions. [2020-11-11 15:11:09,439 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 2551 transitions. Word has length 36 [2020-11-11 15:11:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:09,439 INFO L481 AbstractCegarLoop]: Abstraction has 932 states and 2551 transitions. [2020-11-11 15:11:09,439 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 15:11:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 2551 transitions. [2020-11-11 15:11:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:11:09,446 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:09,447 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 15:11:09,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-11 15:11:09,447 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:09,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:09,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1144099044, now seen corresponding path program 1 times [2020-11-11 15:11:09,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:09,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555796064] [2020-11-11 15:11:09,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:09,598 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 15:11:09,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555796064] [2020-11-11 15:11:09,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991505604] [2020-11-11 15:11:09,599 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 15:11:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:09,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:11:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:09,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:09,768 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 15:11:09,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:09,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-11 15:11:09,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193912249] [2020-11-11 15:11:09,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 15:11:09,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:09,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 15:11:09,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-11 15:11:09,770 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 15:11:09,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:09,936 INFO L93 Difference]: Finished difference Result 1330 states and 3475 transitions. [2020-11-11 15:11:09,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 15:11:09,937 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 15:11:09,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:09,944 INFO L225 Difference]: With dead ends: 1330 [2020-11-11 15:11:09,945 INFO L226 Difference]: Without dead ends: 1060 [2020-11-11 15:11:09,945 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 15:11:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2020-11-11 15:11:09,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 977. [2020-11-11 15:11:09,983 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 15:11:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2641 transitions. [2020-11-11 15:11:09,988 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2641 transitions. Word has length 41 [2020-11-11 15:11:09,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:09,988 INFO L481 AbstractCegarLoop]: Abstraction has 977 states and 2641 transitions. [2020-11-11 15:11:09,989 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 15:11:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2641 transitions. [2020-11-11 15:11:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:11:09,990 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:09,991 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 15:11:10,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-11 15:11:10,206 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:10,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:10,207 INFO L82 PathProgramCache]: Analyzing trace with hash 988054880, now seen corresponding path program 2 times [2020-11-11 15:11:10,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:10,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242653077] [2020-11-11 15:11:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:10,332 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 15:11:10,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242653077] [2020-11-11 15:11:10,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495470360] [2020-11-11 15:11:10,333 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 15:11:10,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:10,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:10,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:11:10,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:10,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:10,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:10,459 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 15:11:10,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:10,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 15:11:10,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861555130] [2020-11-11 15:11:10,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 15:11:10,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:10,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 15:11:10,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-11 15:11:10,462 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 15:11:10,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:10,680 INFO L93 Difference]: Finished difference Result 1460 states and 3735 transitions. [2020-11-11 15:11:10,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 15:11:10,681 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 15:11:10,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:10,689 INFO L225 Difference]: With dead ends: 1460 [2020-11-11 15:11:10,689 INFO L226 Difference]: Without dead ends: 1190 [2020-11-11 15:11:10,689 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 15:11:10,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2020-11-11 15:11:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 982. [2020-11-11 15:11:10,721 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 15:11:10,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 2656 transitions. [2020-11-11 15:11:10,726 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 2656 transitions. Word has length 41 [2020-11-11 15:11:10,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:10,726 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 2656 transitions. [2020-11-11 15:11:10,726 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 15:11:10,726 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 2656 transitions. [2020-11-11 15:11:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:11:10,728 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:10,728 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 15:11:10,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:10,943 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:10,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:10,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1616846382, now seen corresponding path program 3 times [2020-11-11 15:11:10,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:10,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859804719] [2020-11-11 15:11:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:11,047 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 15:11:11,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859804719] [2020-11-11 15:11:11,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137264268] [2020-11-11 15:11:11,048 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 15:11:11,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 15:11:11,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:11,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:11:11,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:11,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:11,150 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 15:11:11,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:11,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-11 15:11:11,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923856535] [2020-11-11 15:11:11,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 15:11:11,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:11,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 15:11:11,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-11 15:11:11,153 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 15:11:11,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:11,407 INFO L93 Difference]: Finished difference Result 2552 states and 6879 transitions. [2020-11-11 15:11:11,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 15:11:11,408 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 15:11:11,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:11,422 INFO L225 Difference]: With dead ends: 2552 [2020-11-11 15:11:11,422 INFO L226 Difference]: Without dead ends: 2282 [2020-11-11 15:11:11,423 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2020-11-11 15:11:11,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1077. [2020-11-11 15:11:11,471 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 15:11:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2967 transitions. [2020-11-11 15:11:11,476 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2967 transitions. Word has length 41 [2020-11-11 15:11:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:11,476 INFO L481 AbstractCegarLoop]: Abstraction has 1077 states and 2967 transitions. [2020-11-11 15:11:11,476 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 15:11:11,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2967 transitions. [2020-11-11 15:11:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:11:11,478 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:11,479 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 15:11:11,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-11 15:11:11,693 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:11,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:11,694 INFO L82 PathProgramCache]: Analyzing trace with hash -966912960, now seen corresponding path program 4 times [2020-11-11 15:11:11,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:11,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207988641] [2020-11-11 15:11:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:11,805 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 15:11:11,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207988641] [2020-11-11 15:11:11,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000778971] [2020-11-11 15:11:11,806 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 15:11:11,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:11,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:11,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:11,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:11,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:11,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:11,939 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 15:11:11,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:11,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-11-11 15:11:11,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134130654] [2020-11-11 15:11:11,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:11:11,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:11,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:11:11,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:11,942 INFO L87 Difference]: Start difference. First operand 1077 states and 2967 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:12,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:12,285 INFO L93 Difference]: Finished difference Result 1892 states and 4965 transitions. [2020-11-11 15:11:12,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:11:12,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 15:11:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:12,296 INFO L225 Difference]: With dead ends: 1892 [2020-11-11 15:11:12,296 INFO L226 Difference]: Without dead ends: 1365 [2020-11-11 15:11:12,297 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:11:12,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2020-11-11 15:11:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1087. [2020-11-11 15:11:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.7495395948434624) internal successors, (2986), 1086 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 2986 transitions. [2020-11-11 15:11:12,335 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 2986 transitions. Word has length 41 [2020-11-11 15:11:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:12,335 INFO L481 AbstractCegarLoop]: Abstraction has 1087 states and 2986 transitions. [2020-11-11 15:11:12,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:12,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 2986 transitions. [2020-11-11 15:11:12,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-11 15:11:12,338 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:12,338 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 15:11:12,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:12,552 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:12,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:12,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2116060661, now seen corresponding path program 1 times [2020-11-11 15:11:12,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:12,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940937339] [2020-11-11 15:11:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:12,646 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 15:11:12,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940937339] [2020-11-11 15:11:12,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024297665] [2020-11-11 15:11:12,646 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 15:11:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:12,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 15:11:12,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:12,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:12,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:12,756 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 15:11:12,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:12,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-11-11 15:11:12,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357845393] [2020-11-11 15:11:12,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:11:12,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:12,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:11:12,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:12,758 INFO L87 Difference]: Start difference. First operand 1087 states and 2986 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:12,960 INFO L93 Difference]: Finished difference Result 2049 states and 5428 transitions. [2020-11-11 15:11:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 15:11:12,960 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 15:11:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:12,971 INFO L225 Difference]: With dead ends: 2049 [2020-11-11 15:11:12,971 INFO L226 Difference]: Without dead ends: 1625 [2020-11-11 15:11:12,971 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:11:12,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2020-11-11 15:11:13,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1250. [2020-11-11 15:11:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 2.7077662129703763) internal successors, (3382), 1249 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 3382 transitions. [2020-11-11 15:11:13,040 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 3382 transitions. Word has length 41 [2020-11-11 15:11:13,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:13,041 INFO L481 AbstractCegarLoop]: Abstraction has 1250 states and 3382 transitions. [2020-11-11 15:11:13,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:13,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 3382 transitions. [2020-11-11 15:11:13,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:13,044 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:13,044 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 15:11:13,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-11 15:11:13,258 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:13,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:13,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1069736565, now seen corresponding path program 1 times [2020-11-11 15:11:13,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:13,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997993675] [2020-11-11 15:11:13,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:13,457 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 15:11:13,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997993675] [2020-11-11 15:11:13,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735263981] [2020-11-11 15:11:13,457 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 15:11:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:13,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:13,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:13,595 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:13,603 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 15:11:13,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:13,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:11:13,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722707881] [2020-11-11 15:11:13,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:13,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:13,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:13,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:13,606 INFO L87 Difference]: Start difference. First operand 1250 states and 3382 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 15:11:13,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:13,782 INFO L93 Difference]: Finished difference Result 1680 states and 4370 transitions. [2020-11-11 15:11:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 15:11:13,783 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 15:11:13,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:13,797 INFO L225 Difference]: With dead ends: 1680 [2020-11-11 15:11:13,797 INFO L226 Difference]: Without dead ends: 1410 [2020-11-11 15:11:13,798 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:11:13,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2020-11-11 15:11:13,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1320. [2020-11-11 15:11:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 2.670204700530705) internal successors, (3522), 1319 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 3522 transitions. [2020-11-11 15:11:13,842 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 3522 transitions. Word has length 51 [2020-11-11 15:11:13,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:13,842 INFO L481 AbstractCegarLoop]: Abstraction has 1320 states and 3522 transitions. [2020-11-11 15:11:13,842 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 15:11:13,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 3522 transitions. [2020-11-11 15:11:13,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:13,845 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:13,845 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 15:11:14,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:14,055 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:14,056 INFO L82 PathProgramCache]: Analyzing trace with hash -865747581, now seen corresponding path program 2 times [2020-11-11 15:11:14,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:14,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790524693] [2020-11-11 15:11:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:14,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790524693] [2020-11-11 15:11:14,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653412689] [2020-11-11 15:11:14,211 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 15:11:14,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:14,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:14,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:14,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:14,345 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:14,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:14,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:14,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-11-11 15:11:14,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116201684] [2020-11-11 15:11:14,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:14,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:14,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:14,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:14,401 INFO L87 Difference]: Start difference. First operand 1320 states and 3522 transitions. Second operand has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 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 15:11:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:14,771 INFO L93 Difference]: Finished difference Result 2393 states and 6116 transitions. [2020-11-11 15:11:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:11:14,771 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 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 51 [2020-11-11 15:11:14,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:14,780 INFO L225 Difference]: With dead ends: 2393 [2020-11-11 15:11:14,780 INFO L226 Difference]: Without dead ends: 2029 [2020-11-11 15:11:14,780 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:11:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2020-11-11 15:11:14,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1327. [2020-11-11 15:11:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 2.6666666666666665) internal successors, (3536), 1326 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 3536 transitions. [2020-11-11 15:11:14,827 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 3536 transitions. Word has length 51 [2020-11-11 15:11:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:14,827 INFO L481 AbstractCegarLoop]: Abstraction has 1327 states and 3536 transitions. [2020-11-11 15:11:14,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 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 15:11:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 3536 transitions. [2020-11-11 15:11:14,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:14,830 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:14,830 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 15:11:15,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-11 15:11:15,044 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:15,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:15,045 INFO L82 PathProgramCache]: Analyzing trace with hash -935339201, now seen corresponding path program 3 times [2020-11-11 15:11:15,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:15,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906452590] [2020-11-11 15:11:15,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:15,229 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 15:11:15,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906452590] [2020-11-11 15:11:15,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142226896] [2020-11-11 15:11:15,230 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 15:11:15,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 15:11:15,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:15,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:15,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:15,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:15,386 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 15:11:15,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:15,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:11:15,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904360884] [2020-11-11 15:11:15,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:15,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:15,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:15,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:15,389 INFO L87 Difference]: Start difference. First operand 1327 states and 3536 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 15:11:15,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:15,684 INFO L93 Difference]: Finished difference Result 1870 states and 4750 transitions. [2020-11-11 15:11:15,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:11:15,685 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 15:11:15,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:15,698 INFO L225 Difference]: With dead ends: 1870 [2020-11-11 15:11:15,698 INFO L226 Difference]: Without dead ends: 1600 [2020-11-11 15:11:15,699 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:11:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2020-11-11 15:11:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1327. [2020-11-11 15:11:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 2.6666666666666665) internal successors, (3536), 1326 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:15,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 3536 transitions. [2020-11-11 15:11:15,753 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 3536 transitions. Word has length 51 [2020-11-11 15:11:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:15,753 INFO L481 AbstractCegarLoop]: Abstraction has 1327 states and 3536 transitions. [2020-11-11 15:11:15,754 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 15:11:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 3536 transitions. [2020-11-11 15:11:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:15,758 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:15,758 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 15:11:15,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 15:11:15,973 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:15,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:15,974 INFO L82 PathProgramCache]: Analyzing trace with hash 896193583, now seen corresponding path program 4 times [2020-11-11 15:11:15,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:15,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519059856] [2020-11-11 15:11:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:16,173 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 15:11:16,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519059856] [2020-11-11 15:11:16,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743353134] [2020-11-11 15:11:16,174 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 15:11:16,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:16,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:16,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:16,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:16,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:16,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:16,324 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 15:11:16,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:16,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-11 15:11:16,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696678195] [2020-11-11 15:11:16,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:16,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:16,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:16,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:16,327 INFO L87 Difference]: Start difference. First operand 1327 states and 3536 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:16,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:16,730 INFO L93 Difference]: Finished difference Result 2354 states and 6069 transitions. [2020-11-11 15:11:16,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:16,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 15:11:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:16,736 INFO L225 Difference]: With dead ends: 2354 [2020-11-11 15:11:16,736 INFO L226 Difference]: Without dead ends: 1785 [2020-11-11 15:11:16,737 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:11:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2020-11-11 15:11:16,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1347. [2020-11-11 15:11:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 2.6939078751857357) internal successors, (3626), 1346 states have internal predecessors, (3626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:16,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 3626 transitions. [2020-11-11 15:11:16,777 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 3626 transitions. Word has length 51 [2020-11-11 15:11:16,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:16,777 INFO L481 AbstractCegarLoop]: Abstraction has 1347 states and 3626 transitions. [2020-11-11 15:11:16,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:16,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 3626 transitions. [2020-11-11 15:11:16,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:16,780 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:16,780 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 15:11:16,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 15:11:16,994 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:16,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:16,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1524985085, now seen corresponding path program 5 times [2020-11-11 15:11:16,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:16,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488491674] [2020-11-11 15:11:16,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:17,157 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 15:11:17,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488491674] [2020-11-11 15:11:17,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783314902] [2020-11-11 15:11:17,158 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 15:11:17,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 15:11:17,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:17,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:17,284 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:17,290 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 15:11:17,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:17,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:11:17,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685347089] [2020-11-11 15:11:17,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:17,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:17,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:17,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:17,292 INFO L87 Difference]: Start difference. First operand 1347 states and 3626 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 15:11:17,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:17,640 INFO L93 Difference]: Finished difference Result 3062 states and 8159 transitions. [2020-11-11 15:11:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:11:17,640 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 15:11:17,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:17,649 INFO L225 Difference]: With dead ends: 3062 [2020-11-11 15:11:17,649 INFO L226 Difference]: Without dead ends: 2792 [2020-11-11 15:11:17,650 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:11:17,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2020-11-11 15:11:17,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 1472. [2020-11-11 15:11:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.7307953772943576) internal successors, (4017), 1471 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 4017 transitions. [2020-11-11 15:11:17,703 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 4017 transitions. Word has length 51 [2020-11-11 15:11:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:17,703 INFO L481 AbstractCegarLoop]: Abstraction has 1472 states and 4017 transitions. [2020-11-11 15:11:17,703 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 15:11:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 4017 transitions. [2020-11-11 15:11:17,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:17,706 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:17,707 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 15:11:17,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-11 15:11:17,920 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:17,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1058774257, now seen corresponding path program 6 times [2020-11-11 15:11:17,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:17,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377123221] [2020-11-11 15:11:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:18,032 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 15:11:18,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377123221] [2020-11-11 15:11:18,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342566834] [2020-11-11 15:11:18,033 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 15:11:18,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 15:11:18,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:18,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 15:11:18,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:18,137 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:18,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:18,160 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 15:11:18,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:18,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:11:18,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620626091] [2020-11-11 15:11:18,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:18,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:18,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:18,163 INFO L87 Difference]: Start difference. First operand 1472 states and 4017 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 15:11:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:18,570 INFO L93 Difference]: Finished difference Result 2061 states and 5435 transitions. [2020-11-11 15:11:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:11:18,570 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 15:11:18,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:18,577 INFO L225 Difference]: With dead ends: 2061 [2020-11-11 15:11:18,577 INFO L226 Difference]: Without dead ends: 1650 [2020-11-11 15:11:18,578 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:11:18,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2020-11-11 15:11:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1422. [2020-11-11 15:11:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 2.7241379310344827) internal successors, (3871), 1421 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 3871 transitions. [2020-11-11 15:11:18,618 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 3871 transitions. Word has length 51 [2020-11-11 15:11:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:18,618 INFO L481 AbstractCegarLoop]: Abstraction has 1422 states and 3871 transitions. [2020-11-11 15:11:18,618 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 15:11:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 3871 transitions. [2020-11-11 15:11:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:18,621 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:18,622 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 15:11:18,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 15:11:18,838 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:18,839 INFO L82 PathProgramCache]: Analyzing trace with hash -955199723, now seen corresponding path program 7 times [2020-11-11 15:11:18,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:18,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205711313] [2020-11-11 15:11:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:18,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205711313] [2020-11-11 15:11:18,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396119525] [2020-11-11 15:11:18,972 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 15:11:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:19,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:11:19,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:19,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:19,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:19,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 15:11:19,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246520529] [2020-11-11 15:11:19,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:11:19,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:19,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:11:19,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:19,099 INFO L87 Difference]: Start difference. First operand 1422 states and 3871 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 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 15:11:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:19,285 INFO L93 Difference]: Finished difference Result 2075 states and 5305 transitions. [2020-11-11 15:11:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 15:11:19,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 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 15:11:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:19,290 INFO L225 Difference]: With dead ends: 2075 [2020-11-11 15:11:19,291 INFO L226 Difference]: Without dead ends: 1790 [2020-11-11 15:11:19,291 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:19,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2020-11-11 15:11:19,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1402. [2020-11-11 15:11:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 2.7344753747323343) internal successors, (3831), 1401 states have internal predecessors, (3831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:19,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 3831 transitions. [2020-11-11 15:11:19,356 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 3831 transitions. Word has length 51 [2020-11-11 15:11:19,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:19,356 INFO L481 AbstractCegarLoop]: Abstraction has 1402 states and 3831 transitions. [2020-11-11 15:11:19,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 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 15:11:19,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 3831 transitions. [2020-11-11 15:11:19,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:19,359 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:19,359 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 15:11:19,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:19,574 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:19,575 INFO L82 PathProgramCache]: Analyzing trace with hash -812913627, now seen corresponding path program 8 times [2020-11-11 15:11:19,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:19,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646950908] [2020-11-11 15:11:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:19,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646950908] [2020-11-11 15:11:19,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822040976] [2020-11-11 15:11:19,694 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 15:11:19,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:19,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:19,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:11:19,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:19,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:19,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:19,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:19,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-11-11 15:11:19,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187230239] [2020-11-11 15:11:19,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:19,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:19,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:19,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:19,841 INFO L87 Difference]: Start difference. First operand 1402 states and 3831 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:20,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:20,118 INFO L93 Difference]: Finished difference Result 2010 states and 5175 transitions. [2020-11-11 15:11:20,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:11:20,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 15:11:20,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:20,123 INFO L225 Difference]: With dead ends: 2010 [2020-11-11 15:11:20,123 INFO L226 Difference]: Without dead ends: 1725 [2020-11-11 15:11:20,124 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:11:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2020-11-11 15:11:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1377. [2020-11-11 15:11:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 2.7478197674418605) internal successors, (3781), 1376 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 3781 transitions. [2020-11-11 15:11:20,159 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 3781 transitions. Word has length 51 [2020-11-11 15:11:20,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:20,160 INFO L481 AbstractCegarLoop]: Abstraction has 1377 states and 3781 transitions. [2020-11-11 15:11:20,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:20,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 3781 transitions. [2020-11-11 15:11:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:20,163 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:20,163 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 15:11:20,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-11-11 15:11:20,376 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:20,377 INFO L82 PathProgramCache]: Analyzing trace with hash -965303273, now seen corresponding path program 9 times [2020-11-11 15:11:20,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:20,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250320505] [2020-11-11 15:11:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:20,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250320505] [2020-11-11 15:11:20,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38544468] [2020-11-11 15:11:20,481 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 15:11:20,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 15:11:20,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:20,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 15:11:20,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:20,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:11:20,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:20,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 15:11:20,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622774641] [2020-11-11 15:11:20,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 15:11:20,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:20,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 15:11:20,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-11 15:11:20,594 INFO L87 Difference]: Start difference. First operand 1377 states and 3781 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 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 15:11:20,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:20,846 INFO L93 Difference]: Finished difference Result 3142 states and 8419 transitions. [2020-11-11 15:11:20,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 15:11:20,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 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 15:11:20,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:20,855 INFO L225 Difference]: With dead ends: 3142 [2020-11-11 15:11:20,855 INFO L226 Difference]: Without dead ends: 2842 [2020-11-11 15:11:20,856 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 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 15:11:20,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2020-11-11 15:11:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 1487. [2020-11-11 15:11:20,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.780619111709287) internal successors, (4132), 1486 states have internal predecessors, (4132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4132 transitions. [2020-11-11 15:11:20,909 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4132 transitions. Word has length 51 [2020-11-11 15:11:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:20,909 INFO L481 AbstractCegarLoop]: Abstraction has 1487 states and 4132 transitions. [2020-11-11 15:11:20,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 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 15:11:20,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4132 transitions. [2020-11-11 15:11:20,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-11 15:11:20,913 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:20,914 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 15:11:21,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:21,126 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:21,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:21,127 INFO L82 PathProgramCache]: Analyzing trace with hash 434994502, now seen corresponding path program 10 times [2020-11-11 15:11:21,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:21,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518251011] [2020-11-11 15:11:21,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:21,233 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 15:11:21,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518251011] [2020-11-11 15:11:21,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884340421] [2020-11-11 15:11:21,234 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 15:11:21,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:21,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:21,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:21,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:21,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:21,352 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:21,360 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 15:11:21,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:21,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 15:11:21,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872475628] [2020-11-11 15:11:21,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:21,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:21,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:21,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:21,362 INFO L87 Difference]: Start difference. First operand 1487 states and 4132 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 15:11:21,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:21,737 INFO L93 Difference]: Finished difference Result 2076 states and 5550 transitions. [2020-11-11 15:11:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 15:11:21,738 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 15:11:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:21,742 INFO L225 Difference]: With dead ends: 2076 [2020-11-11 15:11:21,742 INFO L226 Difference]: Without dead ends: 1605 [2020-11-11 15:11:21,743 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:11:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2020-11-11 15:11:21,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1091. [2020-11-11 15:11:21,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1090 states have (on average 2.7229357798165137) internal successors, (2968), 1090 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:21,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 2968 transitions. [2020-11-11 15:11:21,769 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 2968 transitions. Word has length 51 [2020-11-11 15:11:21,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:21,769 INFO L481 AbstractCegarLoop]: Abstraction has 1091 states and 2968 transitions. [2020-11-11 15:11:21,769 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 15:11:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 2968 transitions. [2020-11-11 15:11:21,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:21,771 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:21,771 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 15:11:21,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-11 15:11:21,985 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:21,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:21,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1906333367, now seen corresponding path program 11 times [2020-11-11 15:11:21,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:21,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596931636] [2020-11-11 15:11:21,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:22,148 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 15:11:22,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596931636] [2020-11-11 15:11:22,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330050820] [2020-11-11 15:11:22,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:11:22,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 15:11:22,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:22,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:22,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:22,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:22,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:22,335 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 15:11:22,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:22,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-11 15:11:22,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519625699] [2020-11-11 15:11:22,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:22,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:22,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:22,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:22,337 INFO L87 Difference]: Start difference. First operand 1091 states and 2968 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:22,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:22,722 INFO L93 Difference]: Finished difference Result 2009 states and 5252 transitions. [2020-11-11 15:11:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:11:22,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 15:11:22,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:22,726 INFO L225 Difference]: With dead ends: 2009 [2020-11-11 15:11:22,726 INFO L226 Difference]: Without dead ends: 1675 [2020-11-11 15:11:22,727 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:11:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2020-11-11 15:11:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1176. [2020-11-11 15:11:22,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.6706382978723404) internal successors, (3138), 1175 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:22,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3138 transitions. [2020-11-11 15:11:22,758 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3138 transitions. Word has length 56 [2020-11-11 15:11:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:22,758 INFO L481 AbstractCegarLoop]: Abstraction has 1176 states and 3138 transitions. [2020-11-11 15:11:22,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:22,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3138 transitions. [2020-11-11 15:11:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:22,761 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:22,761 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 15:11:22,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:22,974 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:22,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2112175369, now seen corresponding path program 12 times [2020-11-11 15:11:22,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:22,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092512627] [2020-11-11 15:11:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:23,111 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 15:11:23,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092512627] [2020-11-11 15:11:23,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837991606] [2020-11-11 15:11:23,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:11:23,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 15:11:23,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:23,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:23,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:23,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:23,230 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 15:11:23,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:23,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-11 15:11:23,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270464547] [2020-11-11 15:11:23,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:23,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:23,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:23,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:23,232 INFO L87 Difference]: Start difference. First operand 1176 states and 3138 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:23,473 INFO L93 Difference]: Finished difference Result 2060 states and 5120 transitions. [2020-11-11 15:11:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 15:11:23,474 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have 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 15:11:23,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:23,478 INFO L225 Difference]: With dead ends: 2060 [2020-11-11 15:11:23,479 INFO L226 Difference]: Without dead ends: 1790 [2020-11-11 15:11:23,479 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:11:23,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2020-11-11 15:11:23,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1277. [2020-11-11 15:11:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 2.6849529780564265) internal successors, (3426), 1276 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 3426 transitions. [2020-11-11 15:11:23,514 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 3426 transitions. Word has length 56 [2020-11-11 15:11:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:23,514 INFO L481 AbstractCegarLoop]: Abstraction has 1277 states and 3426 transitions. [2020-11-11 15:11:23,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 3426 transitions. [2020-11-11 15:11:23,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:23,517 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:23,517 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 15:11:23,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-11 15:11:23,731 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:23,732 INFO L82 PathProgramCache]: Analyzing trace with hash 643256295, now seen corresponding path program 13 times [2020-11-11 15:11:23,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:23,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438190840] [2020-11-11 15:11:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:23,937 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 15:11:23,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438190840] [2020-11-11 15:11:23,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235790294] [2020-11-11 15:11:23,937 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 15:11:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:24,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:24,035 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:24,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:24,094 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 15:11:24,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:24,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 15:11:24,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92886024] [2020-11-11 15:11:24,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:24,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:24,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:24,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:24,098 INFO L87 Difference]: Start difference. First operand 1277 states and 3426 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 15:11:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:24,555 INFO L93 Difference]: Finished difference Result 1995 states and 5040 transitions. [2020-11-11 15:11:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:11:24,556 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 15:11:24,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:24,559 INFO L225 Difference]: With dead ends: 1995 [2020-11-11 15:11:24,559 INFO L226 Difference]: Without dead ends: 1725 [2020-11-11 15:11:24,560 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:11:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2020-11-11 15:11:24,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1327. [2020-11-11 15:11:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 2.6968325791855206) internal successors, (3576), 1326 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 15:11:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 3576 transitions. [2020-11-11 15:11:24,592 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 3576 transitions. Word has length 56 [2020-11-11 15:11:24,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:24,593 INFO L481 AbstractCegarLoop]: Abstraction has 1327 states and 3576 transitions. [2020-11-11 15:11:24,593 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 15:11:24,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 3576 transitions. [2020-11-11 15:11:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:24,596 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:24,596 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 15:11:24,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-11 15:11:24,809 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:24,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:24,810 INFO L82 PathProgramCache]: Analyzing trace with hash -713310411, now seen corresponding path program 14 times [2020-11-11 15:11:24,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:24,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273836473] [2020-11-11 15:11:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:24,943 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 15:11:24,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273836473] [2020-11-11 15:11:24,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515594370] [2020-11-11 15:11:24,944 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 15:11:25,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:25,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:25,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:25,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:25,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:25,061 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 15:11:25,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:25,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-11 15:11:25,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990601964] [2020-11-11 15:11:25,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:25,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:25,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:25,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:25,064 INFO L87 Difference]: Start difference. First operand 1327 states and 3576 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:25,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:25,353 INFO L93 Difference]: Finished difference Result 2020 states and 5140 transitions. [2020-11-11 15:11:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 15:11:25,353 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have 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 15:11:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:25,355 INFO L225 Difference]: With dead ends: 2020 [2020-11-11 15:11:25,355 INFO L226 Difference]: Without dead ends: 1750 [2020-11-11 15:11:25,356 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:11:25,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2020-11-11 15:11:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1377. [2020-11-11 15:11:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 2.707848837209302) internal successors, (3726), 1376 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 15:11:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 3726 transitions. [2020-11-11 15:11:25,388 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 3726 transitions. Word has length 56 [2020-11-11 15:11:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:25,388 INFO L481 AbstractCegarLoop]: Abstraction has 1377 states and 3726 transitions. [2020-11-11 15:11:25,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:25,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 3726 transitions. [2020-11-11 15:11:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:25,391 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:25,391 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 15:11:25,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-11 15:11:25,605 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:25,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:25,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1118222373, now seen corresponding path program 15 times [2020-11-11 15:11:25,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:25,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70614058] [2020-11-11 15:11:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:25,749 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 15:11:25,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70614058] [2020-11-11 15:11:25,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300209156] [2020-11-11 15:11:25,749 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 15:11:25,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 15:11:25,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:25,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:25,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:25,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:25,873 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:25,880 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 15:11:25,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:25,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 15:11:25,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762218049] [2020-11-11 15:11:25,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:25,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:25,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:25,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:25,882 INFO L87 Difference]: Start difference. First operand 1377 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 15:11:26,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:26,329 INFO L93 Difference]: Finished difference Result 2065 states and 5310 transitions. [2020-11-11 15:11:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:26,330 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 15:11:26,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:26,333 INFO L225 Difference]: With dead ends: 2065 [2020-11-11 15:11:26,333 INFO L226 Difference]: Without dead ends: 1795 [2020-11-11 15:11:26,334 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:11:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2020-11-11 15:11:26,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1427. [2020-11-11 15:11:26,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 2.728611500701262) internal successors, (3891), 1426 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 3891 transitions. [2020-11-11 15:11:26,373 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 3891 transitions. Word has length 56 [2020-11-11 15:11:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:26,374 INFO L481 AbstractCegarLoop]: Abstraction has 1427 states and 3891 transitions. [2020-11-11 15:11:26,374 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 15:11:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 3891 transitions. [2020-11-11 15:11:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:26,377 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:26,377 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 15:11:26,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-11 15:11:26,591 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:26,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:26,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1747013875, now seen corresponding path program 16 times [2020-11-11 15:11:26,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:26,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231009422] [2020-11-11 15:11:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:26,714 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 15:11:26,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231009422] [2020-11-11 15:11:26,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934703304] [2020-11-11 15:11:26,715 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 15:11:26,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:26,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:26,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:26,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:26,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:26,809 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 15:11:26,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:26,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-11 15:11:26,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152123671] [2020-11-11 15:11:26,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 15:11:26,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:26,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 15:11:26,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-11 15:11:26,810 INFO L87 Difference]: Start difference. First operand 1427 states and 3891 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:27,167 INFO L93 Difference]: Finished difference Result 3152 states and 8444 transitions. [2020-11-11 15:11:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:11:27,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have 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 15:11:27,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:27,172 INFO L225 Difference]: With dead ends: 3152 [2020-11-11 15:11:27,172 INFO L226 Difference]: Without dead ends: 2882 [2020-11-11 15:11:27,174 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:11:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2020-11-11 15:11:27,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 1552. [2020-11-11 15:11:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 2.7607994842037393) internal successors, (4282), 1551 states have internal predecessors, (4282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 4282 transitions. [2020-11-11 15:11:27,224 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 4282 transitions. Word has length 56 [2020-11-11 15:11:27,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:27,225 INFO L481 AbstractCegarLoop]: Abstraction has 1552 states and 4282 transitions. [2020-11-11 15:11:27,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 4282 transitions. [2020-11-11 15:11:27,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-11 15:11:27,228 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:27,228 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 15:11:27,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-11 15:11:27,442 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:27,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:27,445 INFO L82 PathProgramCache]: Analyzing trace with hash -836745467, now seen corresponding path program 17 times [2020-11-11 15:11:27,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:27,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806982995] [2020-11-11 15:11:27,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:27,582 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 15:11:27,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806982995] [2020-11-11 15:11:27,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516390030] [2020-11-11 15:11:27,584 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 15:11:27,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 15:11:27,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:27,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 15:11:27,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:27,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:27,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:27,717 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 15:11:27,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:27,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-11 15:11:27,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123591796] [2020-11-11 15:11:27,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:27,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:27,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:27,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:27,719 INFO L87 Difference]: Start difference. First operand 1552 states and 4282 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:28,316 INFO L93 Difference]: Finished difference Result 2607 states and 6840 transitions. [2020-11-11 15:11:28,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:11:28,317 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2020-11-11 15:11:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:28,319 INFO L225 Difference]: With dead ends: 2607 [2020-11-11 15:11:28,319 INFO L226 Difference]: Without dead ends: 2080 [2020-11-11 15:11:28,320 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2020-11-11 15:11:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2020-11-11 15:11:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1562. [2020-11-11 15:11:28,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7456758488148623) internal successors, (4286), 1561 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4286 transitions. [2020-11-11 15:11:28,358 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4286 transitions. Word has length 56 [2020-11-11 15:11:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:28,358 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4286 transitions. [2020-11-11 15:11:28,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4286 transitions. [2020-11-11 15:11:28,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:28,362 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:28,362 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 15:11:28,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:28,577 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:28,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:28,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1823983856, now seen corresponding path program 18 times [2020-11-11 15:11:28,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:28,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136542912] [2020-11-11 15:11:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:28,733 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 15:11:28,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136542912] [2020-11-11 15:11:28,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374783667] [2020-11-11 15:11:28,734 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 15:11:28,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 15:11:28,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:28,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:28,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:28,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:28,883 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 15:11:28,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:28,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-11 15:11:28,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951910051] [2020-11-11 15:11:28,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:28,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:28,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:28,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:28,887 INFO L87 Difference]: Start difference. First operand 1562 states and 4286 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 15:11:29,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:29,195 INFO L93 Difference]: Finished difference Result 2205 states and 5700 transitions. [2020-11-11 15:11:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:11:29,196 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 15:11:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:29,199 INFO L225 Difference]: With dead ends: 2205 [2020-11-11 15:11:29,199 INFO L226 Difference]: Without dead ends: 1935 [2020-11-11 15:11:29,200 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:11:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2020-11-11 15:11:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1562. [2020-11-11 15:11:29,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7456758488148623) internal successors, (4286), 1561 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4286 transitions. [2020-11-11 15:11:29,237 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4286 transitions. Word has length 61 [2020-11-11 15:11:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:29,238 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4286 transitions. [2020-11-11 15:11:29,238 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 15:11:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4286 transitions. [2020-11-11 15:11:29,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:29,241 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:29,241 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 15:11:29,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:29,456 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:29,456 INFO L82 PathProgramCache]: Analyzing trace with hash 931447808, now seen corresponding path program 19 times [2020-11-11 15:11:29,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:29,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891709216] [2020-11-11 15:11:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:29,611 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 15:11:29,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891709216] [2020-11-11 15:11:29,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522947216] [2020-11-11 15:11:29,611 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 15:11:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:29,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:29,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:29,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:29,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:29,728 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 15:11:29,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:29,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 15:11:29,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677321811] [2020-11-11 15:11:29,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:29,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:29,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:29,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:29,730 INFO L87 Difference]: Start difference. First operand 1562 states and 4286 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 15:11:30,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:30,145 INFO L93 Difference]: Finished difference Result 2300 states and 5890 transitions. [2020-11-11 15:11:30,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:30,146 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 15:11:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:30,150 INFO L225 Difference]: With dead ends: 2300 [2020-11-11 15:11:30,150 INFO L226 Difference]: Without dead ends: 2030 [2020-11-11 15:11:30,151 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2020-11-11 15:11:30,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2020-11-11 15:11:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1562. [2020-11-11 15:11:30,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7456758488148623) internal successors, (4286), 1561 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:30,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4286 transitions. [2020-11-11 15:11:30,187 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4286 transitions. Word has length 61 [2020-11-11 15:11:30,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:30,188 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4286 transitions. [2020-11-11 15:11:30,188 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 15:11:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4286 transitions. [2020-11-11 15:11:30,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:30,191 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:30,191 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 15:11:30,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:30,405 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:30,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:30,405 INFO L82 PathProgramCache]: Analyzing trace with hash -425118898, now seen corresponding path program 20 times [2020-11-11 15:11:30,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:30,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706736984] [2020-11-11 15:11:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:30,556 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 15:11:30,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706736984] [2020-11-11 15:11:30,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797291507] [2020-11-11 15:11:30,557 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 15:11:30,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:30,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:30,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:30,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:30,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:30,661 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 15:11:30,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:30,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-11 15:11:30,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432558209] [2020-11-11 15:11:30,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:30,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:30,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:30,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:30,663 INFO L87 Difference]: Start difference. First operand 1562 states and 4286 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 15:11:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:31,030 INFO L93 Difference]: Finished difference Result 2255 states and 5800 transitions. [2020-11-11 15:11:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:11:31,031 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 15:11:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:31,034 INFO L225 Difference]: With dead ends: 2255 [2020-11-11 15:11:31,034 INFO L226 Difference]: Without dead ends: 1985 [2020-11-11 15:11:31,035 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 15:11:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2020-11-11 15:11:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1562. [2020-11-11 15:11:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7456758488148623) internal successors, (4286), 1561 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:31,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4286 transitions. [2020-11-11 15:11:31,066 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4286 transitions. Word has length 61 [2020-11-11 15:11:31,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:31,066 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4286 transitions. [2020-11-11 15:11:31,066 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 15:11:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4286 transitions. [2020-11-11 15:11:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:31,069 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:31,069 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 15:11:31,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-11 15:11:31,285 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:31,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:31,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1406413886, now seen corresponding path program 21 times [2020-11-11 15:11:31,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:31,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186386998] [2020-11-11 15:11:31,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:31,421 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 15:11:31,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186386998] [2020-11-11 15:11:31,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13071932] [2020-11-11 15:11:31,422 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 15:11:31,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 15:11:31,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:31,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:31,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:31,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:31,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:31,559 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 15:11:31,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:31,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 15:11:31,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331560352] [2020-11-11 15:11:31,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:31,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:31,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:31,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:31,561 INFO L87 Difference]: Start difference. First operand 1562 states and 4286 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 15:11:32,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:32,034 INFO L93 Difference]: Finished difference Result 2250 states and 5810 transitions. [2020-11-11 15:11:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:11:32,035 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 15:11:32,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:32,038 INFO L225 Difference]: With dead ends: 2250 [2020-11-11 15:11:32,038 INFO L226 Difference]: Without dead ends: 1980 [2020-11-11 15:11:32,038 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 15:11:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2020-11-11 15:11:32,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1562. [2020-11-11 15:11:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.7488789237668163) internal successors, (4291), 1561 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4291 transitions. [2020-11-11 15:11:32,073 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4291 transitions. Word has length 61 [2020-11-11 15:11:32,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:32,073 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4291 transitions. [2020-11-11 15:11:32,073 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 15:11:32,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4291 transitions. [2020-11-11 15:11:32,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:32,076 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:32,076 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 15:11:32,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:32,290 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:32,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:32,290 INFO L82 PathProgramCache]: Analyzing trace with hash 2035205388, now seen corresponding path program 22 times [2020-11-11 15:11:32,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:32,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996308134] [2020-11-11 15:11:32,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:32,412 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 15:11:32,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996308134] [2020-11-11 15:11:32,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901008406] [2020-11-11 15:11:32,413 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 15:11:32,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:32,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:32,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:32,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:32,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:32,517 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 15:11:32,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:32,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-11 15:11:32,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475277010] [2020-11-11 15:11:32,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 15:11:32,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:32,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 15:11:32,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-11 15:11:32,519 INFO L87 Difference]: Start difference. First operand 1562 states and 4291 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 15:11:32,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:32,950 INFO L93 Difference]: Finished difference Result 3312 states and 8894 transitions. [2020-11-11 15:11:32,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:32,950 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 15:11:32,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:32,954 INFO L225 Difference]: With dead ends: 3312 [2020-11-11 15:11:32,955 INFO L226 Difference]: Without dead ends: 3042 [2020-11-11 15:11:32,955 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2020-11-11 15:11:32,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2020-11-11 15:11:32,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 1687. [2020-11-11 15:11:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 2.7769869513641754) internal successors, (4682), 1686 states have internal predecessors, (4682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:32,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 4682 transitions. [2020-11-11 15:11:32,998 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 4682 transitions. Word has length 61 [2020-11-11 15:11:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:32,998 INFO L481 AbstractCegarLoop]: Abstraction has 1687 states and 4682 transitions. [2020-11-11 15:11:32,999 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 15:11:32,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 4682 transitions. [2020-11-11 15:11:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-11 15:11:33,002 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:33,002 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 15:11:33,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-11 15:11:33,214 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:33,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash -548553954, now seen corresponding path program 23 times [2020-11-11 15:11:33,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:33,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60234741] [2020-11-11 15:11:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:33,385 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 15:11:33,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60234741] [2020-11-11 15:11:33,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526318200] [2020-11-11 15:11:33,386 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 15:11:33,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 15:11:33,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:33,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 15:11:33,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:33,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:33,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:33,541 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 15:11:33,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:33,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-11 15:11:33,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262401472] [2020-11-11 15:11:33,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:33,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:33,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:33,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:33,543 INFO L87 Difference]: Start difference. First operand 1687 states and 4682 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 15:11:34,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:34,282 INFO L93 Difference]: Finished difference Result 2707 states and 7140 transitions. [2020-11-11 15:11:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:11:34,283 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 15:11:34,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:34,286 INFO L225 Difference]: With dead ends: 2707 [2020-11-11 15:11:34,286 INFO L226 Difference]: Without dead ends: 2180 [2020-11-11 15:11:34,287 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 15:11:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2020-11-11 15:11:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1301. [2020-11-11 15:11:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 2.706153846153846) internal successors, (3518), 1300 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:34,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 3518 transitions. [2020-11-11 15:11:34,312 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 3518 transitions. Word has length 61 [2020-11-11 15:11:34,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:34,312 INFO L481 AbstractCegarLoop]: Abstraction has 1301 states and 3518 transitions. [2020-11-11 15:11:34,312 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 15:11:34,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 3518 transitions. [2020-11-11 15:11:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:34,314 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:34,315 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 15:11:34,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:34,530 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:34,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1466794138, now seen corresponding path program 24 times [2020-11-11 15:11:34,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:34,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234214395] [2020-11-11 15:11:34,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:34,706 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 15:11:34,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234214395] [2020-11-11 15:11:34,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932174401] [2020-11-11 15:11:34,707 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 15:11:34,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:11:34,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:34,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:34,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:34,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:34,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:34,860 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 15:11:34,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:34,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-11-11 15:11:34,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222109941] [2020-11-11 15:11:34,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:11:34,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:34,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:11:34,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:34,862 INFO L87 Difference]: Start difference. First operand 1301 states and 3518 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:35,271 INFO L93 Difference]: Finished difference Result 2269 states and 5902 transitions. [2020-11-11 15:11:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:35,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have 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 15:11:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:35,274 INFO L225 Difference]: With dead ends: 2269 [2020-11-11 15:11:35,274 INFO L226 Difference]: Without dead ends: 1935 [2020-11-11 15:11:35,274 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:11:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2020-11-11 15:11:35,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1386. [2020-11-11 15:11:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 2.6628158844765344) internal successors, (3688), 1385 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:35,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 3688 transitions. [2020-11-11 15:11:35,300 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 3688 transitions. Word has length 66 [2020-11-11 15:11:35,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:35,301 INFO L481 AbstractCegarLoop]: Abstraction has 1386 states and 3688 transitions. [2020-11-11 15:11:35,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:35,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 3688 transitions. [2020-11-11 15:11:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:35,304 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:35,304 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 15:11:35,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-11 15:11:35,517 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:35,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:35,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1504782136, now seen corresponding path program 25 times [2020-11-11 15:11:35,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:35,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148160661] [2020-11-11 15:11:35,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:35,680 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 15:11:35,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148160661] [2020-11-11 15:11:35,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786529502] [2020-11-11 15:11:35,681 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 15:11:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:35,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:35,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:35,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:35,795 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 15:11:35,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:35,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-11-11 15:11:35,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203332643] [2020-11-11 15:11:35,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:35,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:35,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:35,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:35,797 INFO L87 Difference]: Start difference. First operand 1386 states and 3688 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:36,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:36,086 INFO L93 Difference]: Finished difference Result 2420 states and 5970 transitions. [2020-11-11 15:11:36,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-11 15:11:36,086 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 15:11:36,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:36,090 INFO L225 Difference]: With dead ends: 2420 [2020-11-11 15:11:36,090 INFO L226 Difference]: Without dead ends: 2150 [2020-11-11 15:11:36,091 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:11:36,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2020-11-11 15:11:36,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1487. [2020-11-11 15:11:36,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 2.6756393001345895) internal successors, (3976), 1486 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 15:11:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 3976 transitions. [2020-11-11 15:11:36,186 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 3976 transitions. Word has length 66 [2020-11-11 15:11:36,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:36,187 INFO L481 AbstractCegarLoop]: Abstraction has 1487 states and 3976 transitions. [2020-11-11 15:11:36,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 3976 transitions. [2020-11-11 15:11:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:36,190 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:36,191 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 15:11:36,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:36,407 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:36,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:36,408 INFO L82 PathProgramCache]: Analyzing trace with hash -676070984, now seen corresponding path program 26 times [2020-11-11 15:11:36,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:36,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046443865] [2020-11-11 15:11:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:36,588 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 15:11:36,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046443865] [2020-11-11 15:11:36,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561393736] [2020-11-11 15:11:36,588 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 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 15:11:36,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:36,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:36,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:36,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:36,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:36,708 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:36,717 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 15:11:36,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:36,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:11:36,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826860436] [2020-11-11 15:11:36,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:36,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:36,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:36,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:36,719 INFO L87 Difference]: Start difference. First operand 1487 states and 3976 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 15:11:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:37,153 INFO L93 Difference]: Finished difference Result 2355 states and 5890 transitions. [2020-11-11 15:11:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:37,154 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 15:11:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:37,157 INFO L225 Difference]: With dead ends: 2355 [2020-11-11 15:11:37,158 INFO L226 Difference]: Without dead ends: 2085 [2020-11-11 15:11:37,158 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:11:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2020-11-11 15:11:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1537. [2020-11-11 15:11:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 2.6861979166666665) internal successors, (4126), 1536 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 4126 transitions. [2020-11-11 15:11:37,191 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 4126 transitions. Word has length 66 [2020-11-11 15:11:37,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:37,191 INFO L481 AbstractCegarLoop]: Abstraction has 1537 states and 4126 transitions. [2020-11-11 15:11:37,191 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 15:11:37,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 4126 transitions. [2020-11-11 15:11:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:37,194 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:37,194 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 15:11:37,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-11 15:11:37,408 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:37,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:37,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1896357766, now seen corresponding path program 27 times [2020-11-11 15:11:37,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:37,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068358588] [2020-11-11 15:11:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:37,577 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 15:11:37,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068358588] [2020-11-11 15:11:37,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542785190] [2020-11-11 15:11:37,577 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 15:11:37,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:11:37,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:37,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:37,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:37,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:37,684 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 15:11:37,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:37,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-11-11 15:11:37,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120797826] [2020-11-11 15:11:37,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:37,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:37,686 INFO L87 Difference]: Start difference. First operand 1537 states and 4126 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:38,026 INFO L93 Difference]: Finished difference Result 2380 states and 5990 transitions. [2020-11-11 15:11:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 15:11:38,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 15:11:38,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:38,029 INFO L225 Difference]: With dead ends: 2380 [2020-11-11 15:11:38,029 INFO L226 Difference]: Without dead ends: 2110 [2020-11-11 15:11:38,030 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:11:38,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2020-11-11 15:11:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1587. [2020-11-11 15:11:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.6960907944514503) internal successors, (4276), 1586 states have internal predecessors, (4276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 4276 transitions. [2020-11-11 15:11:38,054 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 4276 transitions. Word has length 66 [2020-11-11 15:11:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:38,054 INFO L481 AbstractCegarLoop]: Abstraction has 1587 states and 4276 transitions. [2020-11-11 15:11:38,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 4276 transitions. [2020-11-11 15:11:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:38,057 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:38,057 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 15:11:38,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-11 15:11:38,272 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:38,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:38,273 INFO L82 PathProgramCache]: Analyzing trace with hash 356822134, now seen corresponding path program 28 times [2020-11-11 15:11:38,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:38,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425039502] [2020-11-11 15:11:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:38,427 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 15:11:38,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425039502] [2020-11-11 15:11:38,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270000220] [2020-11-11 15:11:38,428 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 15:11:38,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:38,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:38,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:38,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:38,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:38,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:38,562 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 15:11:38,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:38,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:11:38,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356186443] [2020-11-11 15:11:38,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:38,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:38,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:38,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:38,564 INFO L87 Difference]: Start difference. First operand 1587 states and 4276 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 15:11:39,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:39,099 INFO L93 Difference]: Finished difference Result 2380 states and 6040 transitions. [2020-11-11 15:11:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:11:39,100 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 15:11:39,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:39,102 INFO L225 Difference]: With dead ends: 2380 [2020-11-11 15:11:39,102 INFO L226 Difference]: Without dead ends: 2110 [2020-11-11 15:11:39,103 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:11:39,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2020-11-11 15:11:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1637. [2020-11-11 15:11:39,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 2.7053789731051343) internal successors, (4426), 1636 states have internal predecessors, (4426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:39,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 4426 transitions. [2020-11-11 15:11:39,131 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 4426 transitions. Word has length 66 [2020-11-11 15:11:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:39,131 INFO L481 AbstractCegarLoop]: Abstraction has 1637 states and 4426 transitions. [2020-11-11 15:11:39,131 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 15:11:39,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 4426 transitions. [2020-11-11 15:11:39,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:39,134 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:39,134 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 15:11:39,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-11 15:11:39,349 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:39,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:39,350 INFO L82 PathProgramCache]: Analyzing trace with hash -999744572, now seen corresponding path program 29 times [2020-11-11 15:11:39,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:39,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793500732] [2020-11-11 15:11:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:39,511 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 15:11:39,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793500732] [2020-11-11 15:11:39,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619079498] [2020-11-11 15:11:39,512 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 15:11:39,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 15:11:39,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:39,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:39,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:39,622 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 15:11:39,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:39,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-11-11 15:11:39,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078672099] [2020-11-11 15:11:39,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:39,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:39,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:39,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:39,631 INFO L87 Difference]: Start difference. First operand 1637 states and 4426 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:40,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:40,068 INFO L93 Difference]: Finished difference Result 2410 states and 6165 transitions. [2020-11-11 15:11:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:11:40,068 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 15:11:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:40,071 INFO L225 Difference]: With dead ends: 2410 [2020-11-11 15:11:40,071 INFO L226 Difference]: Without dead ends: 2140 [2020-11-11 15:11:40,072 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:11:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2020-11-11 15:11:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1687. [2020-11-11 15:11:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 2.720047449584816) internal successors, (4586), 1686 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:40,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 4586 transitions. [2020-11-11 15:11:40,106 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 4586 transitions. Word has length 66 [2020-11-11 15:11:40,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:40,106 INFO L481 AbstractCegarLoop]: Abstraction has 1687 states and 4586 transitions. [2020-11-11 15:11:40,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 4586 transitions. [2020-11-11 15:11:40,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:40,109 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:40,109 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 15:11:40,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-11 15:11:40,324 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:40,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:40,324 INFO L82 PathProgramCache]: Analyzing trace with hash 831788212, now seen corresponding path program 30 times [2020-11-11 15:11:40,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:40,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318167995] [2020-11-11 15:11:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:40,475 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 15:11:40,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318167995] [2020-11-11 15:11:40,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807640317] [2020-11-11 15:11:40,475 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 15:11:40,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:11:40,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:40,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:40,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:40,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:40,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:40,623 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 15:11:40,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:40,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 15:11:40,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690417326] [2020-11-11 15:11:40,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:40,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:40,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:40,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:40,625 INFO L87 Difference]: Start difference. First operand 1687 states and 4586 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 15:11:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:41,260 INFO L93 Difference]: Finished difference Result 2869 states and 7434 transitions. [2020-11-11 15:11:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:11:41,260 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 15:11:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:41,264 INFO L225 Difference]: With dead ends: 2869 [2020-11-11 15:11:41,264 INFO L226 Difference]: Without dead ends: 2300 [2020-11-11 15:11:41,265 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 15:11:41,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2020-11-11 15:11:41,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1737. [2020-11-11 15:11:41,295 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 15:11:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 4741 transitions. [2020-11-11 15:11:41,299 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 4741 transitions. Word has length 66 [2020-11-11 15:11:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:41,300 INFO L481 AbstractCegarLoop]: Abstraction has 1737 states and 4741 transitions. [2020-11-11 15:11:41,300 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 15:11:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 4741 transitions. [2020-11-11 15:11:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:41,302 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:41,302 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 15:11:41,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:41,516 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:41,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1460579714, now seen corresponding path program 31 times [2020-11-11 15:11:41,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:41,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397610465] [2020-11-11 15:11:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:41,653 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 15:11:41,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397610465] [2020-11-11 15:11:41,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415673668] [2020-11-11 15:11:41,654 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 15:11:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:41,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:41,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:41,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:41,790 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 15:11:41,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:41,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-11-11 15:11:41,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239317624] [2020-11-11 15:11:41,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 15:11:41,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:41,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 15:11:41,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-11 15:11:41,792 INFO L87 Difference]: Start difference. First operand 1737 states and 4741 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:42,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:42,270 INFO L93 Difference]: Finished difference Result 3512 states and 9394 transitions. [2020-11-11 15:11:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:42,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 15:11:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:42,275 INFO L225 Difference]: With dead ends: 3512 [2020-11-11 15:11:42,275 INFO L226 Difference]: Without dead ends: 3242 [2020-11-11 15:11:42,275 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2020-11-11 15:11:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2020-11-11 15:11:42,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 1862. [2020-11-11 15:11:42,304 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 15:11:42,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 5132 transitions. [2020-11-11 15:11:42,308 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 5132 transitions. Word has length 66 [2020-11-11 15:11:42,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:42,308 INFO L481 AbstractCegarLoop]: Abstraction has 1862 states and 5132 transitions. [2020-11-11 15:11:42,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:42,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 5132 transitions. [2020-11-11 15:11:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-11-11 15:11:42,311 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:42,311 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 15:11:42,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-11 15:11:42,512 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:42,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:42,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1123179628, now seen corresponding path program 32 times [2020-11-11 15:11:42,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:42,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503881542] [2020-11-11 15:11:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:42,655 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 15:11:42,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503881542] [2020-11-11 15:11:42,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788184071] [2020-11-11 15:11:42,656 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 15:11:42,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:42,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:42,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 15:11:42,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:42,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:42,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:42,796 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 15:11:42,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:42,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-11-11 15:11:42,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808533171] [2020-11-11 15:11:42,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:42,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:42,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:42,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:42,797 INFO L87 Difference]: Start difference. First operand 1862 states and 5132 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:43,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:43,585 INFO L93 Difference]: Finished difference Result 2887 states and 7550 transitions. [2020-11-11 15:11:43,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:11:43,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2020-11-11 15:11:43,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:43,589 INFO L225 Difference]: With dead ends: 2887 [2020-11-11 15:11:43,589 INFO L226 Difference]: Without dead ends: 2360 [2020-11-11 15:11:43,590 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 15:11:43,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2020-11-11 15:11:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 1512. [2020-11-11 15:11:43,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 2.697551290536069) internal successors, (4076), 1511 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 15:11:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 4076 transitions. [2020-11-11 15:11:43,625 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 4076 transitions. Word has length 66 [2020-11-11 15:11:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:43,626 INFO L481 AbstractCegarLoop]: Abstraction has 1512 states and 4076 transitions. [2020-11-11 15:11:43,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 4076 transitions. [2020-11-11 15:11:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:43,628 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:43,628 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 15:11:43,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-11 15:11:43,842 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:43,843 INFO L82 PathProgramCache]: Analyzing trace with hash 244367777, now seen corresponding path program 33 times [2020-11-11 15:11:43,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:43,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865723788] [2020-11-11 15:11:43,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:44,025 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 15:11:44,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865723788] [2020-11-11 15:11:44,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949979852] [2020-11-11 15:11:44,025 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 15:11:44,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:11:44,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:44,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:44,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:44,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:44,131 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 15:11:44,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:44,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:11:44,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141330670] [2020-11-11 15:11:44,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:44,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:44,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:44,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:44,132 INFO L87 Difference]: Start difference. First operand 1512 states and 4076 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 15:11:44,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:44,502 INFO L93 Difference]: Finished difference Result 2305 states and 5840 transitions. [2020-11-11 15:11:44,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:11:44,502 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 15:11:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:44,521 INFO L225 Difference]: With dead ends: 2305 [2020-11-11 15:11:44,521 INFO L226 Difference]: Without dead ends: 2035 [2020-11-11 15:11:44,521 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:11:44,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2020-11-11 15:11:44,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1562. [2020-11-11 15:11:44,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.707238949391416) internal successors, (4226), 1561 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 15:11:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4226 transitions. [2020-11-11 15:11:44,547 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4226 transitions. Word has length 71 [2020-11-11 15:11:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:44,548 INFO L481 AbstractCegarLoop]: Abstraction has 1562 states and 4226 transitions. [2020-11-11 15:11:44,548 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 15:11:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4226 transitions. [2020-11-11 15:11:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:44,550 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:44,550 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 15:11:44,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:44,751 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:44,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1073078929, now seen corresponding path program 34 times [2020-11-11 15:11:44,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:44,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491035017] [2020-11-11 15:11:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:44,955 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 15:11:44,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491035017] [2020-11-11 15:11:44,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852362997] [2020-11-11 15:11:44,956 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 15:11:45,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:45,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:45,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:11:45,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:45,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:45,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:45,091 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 15:11:45,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:45,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:11:45,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911253322] [2020-11-11 15:11:45,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:45,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:45,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:45,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:45,094 INFO L87 Difference]: Start difference. First operand 1562 states and 4226 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 15:11:45,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:45,613 INFO L93 Difference]: Finished difference Result 2500 states and 6280 transitions. [2020-11-11 15:11:45,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:11:45,614 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 15:11:45,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:45,617 INFO L225 Difference]: With dead ends: 2500 [2020-11-11 15:11:45,617 INFO L226 Difference]: Without dead ends: 2230 [2020-11-11 15:11:45,618 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 15:11:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2020-11-11 15:11:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1612. [2020-11-11 15:11:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 2.716325263811297) internal successors, (4376), 1611 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 15:11:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 4376 transitions. [2020-11-11 15:11:45,645 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 4376 transitions. Word has length 71 [2020-11-11 15:11:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:45,645 INFO L481 AbstractCegarLoop]: Abstraction has 1612 states and 4376 transitions. [2020-11-11 15:11:45,646 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 15:11:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 4376 transitions. [2020-11-11 15:11:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:45,647 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:45,648 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 15:11:45,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-11 15:11:45,848 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:45,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash -649459617, now seen corresponding path program 35 times [2020-11-11 15:11:45,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:45,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377851752] [2020-11-11 15:11:45,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:46,025 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 15:11:46,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377851752] [2020-11-11 15:11:46,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110788083] [2020-11-11 15:11:46,026 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 15:11:46,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 15:11:46,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:46,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:46,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:46,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:46,129 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 15:11:46,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:46,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:11:46,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947693316] [2020-11-11 15:11:46,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:46,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:46,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:46,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:46,131 INFO L87 Difference]: Start difference. First operand 1612 states and 4376 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 15:11:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:46,573 INFO L93 Difference]: Finished difference Result 2505 states and 6340 transitions. [2020-11-11 15:11:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:46,574 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 15:11:46,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:46,577 INFO L225 Difference]: With dead ends: 2505 [2020-11-11 15:11:46,577 INFO L226 Difference]: Without dead ends: 2235 [2020-11-11 15:11:46,578 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2020-11-11 15:11:46,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2020-11-11 15:11:46,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1662. [2020-11-11 15:11:46,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.724864539434076) internal successors, (4526), 1661 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 15:11:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 4526 transitions. [2020-11-11 15:11:46,613 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 4526 transitions. Word has length 71 [2020-11-11 15:11:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:46,613 INFO L481 AbstractCegarLoop]: Abstraction has 1662 states and 4526 transitions. [2020-11-11 15:11:46,613 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 15:11:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 4526 transitions. [2020-11-11 15:11:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:46,616 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:46,616 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 15:11:46,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:46,831 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:46,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:46,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2105972047, now seen corresponding path program 36 times [2020-11-11 15:11:46,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:46,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47601410] [2020-11-11 15:11:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:47,025 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 15:11:47,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47601410] [2020-11-11 15:11:47,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583776844] [2020-11-11 15:11:47,026 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 15:11:47,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 15:11:47,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:47,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:47,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:47,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:47,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:47,155 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 15:11:47,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:47,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:11:47,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174498920] [2020-11-11 15:11:47,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:47,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:47,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:47,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:47,157 INFO L87 Difference]: Start difference. First operand 1662 states and 4526 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 15:11:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:47,755 INFO L93 Difference]: Finished difference Result 2505 states and 6390 transitions. [2020-11-11 15:11:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:11:47,756 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 15:11:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:47,760 INFO L225 Difference]: With dead ends: 2505 [2020-11-11 15:11:47,760 INFO L226 Difference]: Without dead ends: 2235 [2020-11-11 15:11:47,762 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 15:11:47,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2235 states. [2020-11-11 15:11:47,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2235 to 1712. [2020-11-11 15:11:47,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1711 states have (on average 2.732904734073641) internal successors, (4676), 1711 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 15:11:47,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 4676 transitions. [2020-11-11 15:11:47,823 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 4676 transitions. Word has length 71 [2020-11-11 15:11:47,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:47,824 INFO L481 AbstractCegarLoop]: Abstraction has 1712 states and 4676 transitions. [2020-11-11 15:11:47,824 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 15:11:47,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 4676 transitions. [2020-11-11 15:11:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:47,827 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:47,827 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 15:11:48,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-11 15:11:48,042 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:48,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:48,043 INFO L82 PathProgramCache]: Analyzing trace with hash 749405341, now seen corresponding path program 37 times [2020-11-11 15:11:48,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:48,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983683306] [2020-11-11 15:11:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:48,205 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 15:11:48,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983683306] [2020-11-11 15:11:48,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224116219] [2020-11-11 15:11:48,206 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 15:11:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:48,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:48,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:48,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:48,314 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 15:11:48,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:48,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:11:48,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500246990] [2020-11-11 15:11:48,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:48,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:48,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:48,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:48,316 INFO L87 Difference]: Start difference. First operand 1712 states and 4676 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 15:11:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:48,805 INFO L93 Difference]: Finished difference Result 2535 states and 6515 transitions. [2020-11-11 15:11:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:11:48,805 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 15:11:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:48,808 INFO L225 Difference]: With dead ends: 2535 [2020-11-11 15:11:48,808 INFO L226 Difference]: Without dead ends: 2265 [2020-11-11 15:11:48,809 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:11:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2020-11-11 15:11:48,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1762. [2020-11-11 15:11:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 2.746166950596252) internal successors, (4836), 1761 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 4836 transitions. [2020-11-11 15:11:48,835 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 4836 transitions. Word has length 71 [2020-11-11 15:11:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:48,836 INFO L481 AbstractCegarLoop]: Abstraction has 1762 states and 4836 transitions. [2020-11-11 15:11:48,836 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 15:11:48,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 4836 transitions. [2020-11-11 15:11:48,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:48,838 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:48,839 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 15:11:49,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-11 15:11:49,053 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:49,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:49,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1714029171, now seen corresponding path program 38 times [2020-11-11 15:11:49,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:49,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007407432] [2020-11-11 15:11:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:49,231 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 15:11:49,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007407432] [2020-11-11 15:11:49,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881713618] [2020-11-11 15:11:49,231 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 15:11:49,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:49,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:49,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:49,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:49,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:49,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:49,373 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 15:11:49,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:49,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:11:49,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231428089] [2020-11-11 15:11:49,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:49,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:49,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:49,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:49,375 INFO L87 Difference]: Start difference. First operand 1762 states and 4836 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 15:11:50,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:50,138 INFO L93 Difference]: Finished difference Result 2994 states and 7784 transitions. [2020-11-11 15:11:50,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:11:50,139 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 15:11:50,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:50,143 INFO L225 Difference]: With dead ends: 2994 [2020-11-11 15:11:50,143 INFO L226 Difference]: Without dead ends: 2425 [2020-11-11 15:11:50,144 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:11:50,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2020-11-11 15:11:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1812. [2020-11-11 15:11:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 2.755935946990613) internal successors, (4991), 1811 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:50,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 4991 transitions. [2020-11-11 15:11:50,182 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 4991 transitions. Word has length 71 [2020-11-11 15:11:50,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:50,182 INFO L481 AbstractCegarLoop]: Abstraction has 1812 states and 4991 transitions. [2020-11-11 15:11:50,182 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 15:11:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 4991 transitions. [2020-11-11 15:11:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:50,185 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:50,186 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 15:11:50,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-11 15:11:50,399 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:50,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:50,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1085237669, now seen corresponding path program 39 times [2020-11-11 15:11:50,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:50,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112430737] [2020-11-11 15:11:50,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:50,564 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 15:11:50,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112430737] [2020-11-11 15:11:50,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411774616] [2020-11-11 15:11:50,564 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 15:11:50,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 15:11:50,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:50,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 15:11:50,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:50,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:50,672 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 15:11:50,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:50,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 15:11:50,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63939169] [2020-11-11 15:11:50,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 15:11:50,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:50,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 15:11:50,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-11 15:11:50,674 INFO L87 Difference]: Start difference. First operand 1812 states and 4991 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 15:11:51,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:51,237 INFO L93 Difference]: Finished difference Result 3612 states and 9694 transitions. [2020-11-11 15:11:51,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:11:51,237 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 15:11:51,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:51,242 INFO L225 Difference]: With dead ends: 3612 [2020-11-11 15:11:51,242 INFO L226 Difference]: Without dead ends: 3342 [2020-11-11 15:11:51,242 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 15:11:51,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2020-11-11 15:11:51,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 1937. [2020-11-11 15:11:51,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 2.7799586776859506) internal successors, (5382), 1936 states have internal predecessors, (5382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 5382 transitions. [2020-11-11 15:11:51,270 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 5382 transitions. Word has length 71 [2020-11-11 15:11:51,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:51,270 INFO L481 AbstractCegarLoop]: Abstraction has 1937 states and 5382 transitions. [2020-11-11 15:11:51,270 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 15:11:51,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 5382 transitions. [2020-11-11 15:11:51,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-11 15:11:51,272 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:51,273 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 15:11:51,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-11 15:11:51,473 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:51,474 INFO L82 PathProgramCache]: Analyzing trace with hash 625970285, now seen corresponding path program 40 times [2020-11-11 15:11:51,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:51,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701641053] [2020-11-11 15:11:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:51,656 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 15:11:51,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701641053] [2020-11-11 15:11:51,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193546398] [2020-11-11 15:11:51,656 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 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 15:11:51,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:51,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:51,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:11:51,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:51,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:51,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:51,783 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 15:11:51,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:51,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 15:11:51,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897249033] [2020-11-11 15:11:51,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 15:11:51,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:51,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 15:11:51,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-11 15:11:51,785 INFO L87 Difference]: Start difference. First operand 1937 states and 5382 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 15:11:52,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:52,505 INFO L93 Difference]: Finished difference Result 2626 states and 7000 transitions. [2020-11-11 15:11:52,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:11:52,506 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 15:11:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:52,510 INFO L225 Difference]: With dead ends: 2626 [2020-11-11 15:11:52,510 INFO L226 Difference]: Without dead ends: 2215 [2020-11-11 15:11:52,510 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:11:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2020-11-11 15:11:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 1887. [2020-11-11 15:11:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.7762460233297985) internal successors, (5236), 1886 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5236 transitions. [2020-11-11 15:11:52,540 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5236 transitions. Word has length 71 [2020-11-11 15:11:52,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:52,540 INFO L481 AbstractCegarLoop]: Abstraction has 1887 states and 5236 transitions. [2020-11-11 15:11:52,540 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 15:11:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5236 transitions. [2020-11-11 15:11:52,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:52,543 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:52,543 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 15:11:52,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:52,744 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:52,744 INFO L82 PathProgramCache]: Analyzing trace with hash 582428331, now seen corresponding path program 41 times [2020-11-11 15:11:52,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:52,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048905139] [2020-11-11 15:11:52,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:52,976 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 15:11:52,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048905139] [2020-11-11 15:11:52,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580496132] [2020-11-11 15:11:52,976 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 15:11:53,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:11:53,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:53,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:11:53,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:53,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:53,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:53,134 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 15:11:53,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:53,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2020-11-11 15:11:53,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297506954] [2020-11-11 15:11:53,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:11:53,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:53,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:11:53,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:11:53,135 INFO L87 Difference]: Start difference. First operand 1887 states and 5236 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 15:11:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:53,628 INFO L93 Difference]: Finished difference Result 2905 states and 7720 transitions. [2020-11-11 15:11:53,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:11:53,628 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 15:11:53,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:53,632 INFO L225 Difference]: With dead ends: 2905 [2020-11-11 15:11:53,632 INFO L226 Difference]: Without dead ends: 2571 [2020-11-11 15:11:53,632 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 15:11:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2020-11-11 15:11:53,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1972. [2020-11-11 15:11:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1972 states, 1971 states have (on average 2.7427701674277016) internal successors, (5406), 1971 states have internal predecessors, (5406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 5406 transitions. [2020-11-11 15:11:53,661 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 5406 transitions. Word has length 76 [2020-11-11 15:11:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:53,662 INFO L481 AbstractCegarLoop]: Abstraction has 1972 states and 5406 transitions. [2020-11-11 15:11:53,662 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 15:11:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 5406 transitions. [2020-11-11 15:11:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:53,664 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:53,664 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 15:11:53,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-11-11 15:11:53,865 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:53,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:53,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1793236313, now seen corresponding path program 42 times [2020-11-11 15:11:53,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:53,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257360656] [2020-11-11 15:11:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:54,068 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 15:11:54,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257360656] [2020-11-11 15:11:54,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152873771] [2020-11-11 15:11:54,069 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 15:11:54,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:11:54,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:54,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:54,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:54,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:54,204 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 15:11:54,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:54,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:11:54,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284763939] [2020-11-11 15:11:54,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:11:54,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:54,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:11:54,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:54,209 INFO L87 Difference]: Start difference. First operand 1972 states and 5406 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 15:11:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:54,591 INFO L93 Difference]: Finished difference Result 3070 states and 7730 transitions. [2020-11-11 15:11:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 15:11:54,591 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 15:11:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:54,595 INFO L225 Difference]: With dead ends: 3070 [2020-11-11 15:11:54,595 INFO L226 Difference]: Without dead ends: 2800 [2020-11-11 15:11:54,596 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 15:11:54,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2020-11-11 15:11:54,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1987. [2020-11-11 15:11:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 2.7371601208459215) internal successors, (5436), 1986 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 5436 transitions. [2020-11-11 15:11:54,634 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 5436 transitions. Word has length 76 [2020-11-11 15:11:54,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:54,635 INFO L481 AbstractCegarLoop]: Abstraction has 1987 states and 5436 transitions. [2020-11-11 15:11:54,635 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 15:11:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 5436 transitions. [2020-11-11 15:11:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:54,638 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:54,639 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 15:11:54,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:54,852 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:54,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:54,852 INFO L82 PathProgramCache]: Analyzing trace with hash 247943753, now seen corresponding path program 43 times [2020-11-11 15:11:54,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:54,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613052776] [2020-11-11 15:11:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:55,078 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 15:11:55,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613052776] [2020-11-11 15:11:55,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863736993] [2020-11-11 15:11:55,079 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 15:11:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:55,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:55,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:55,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:55,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:55,225 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 15:11:55,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:55,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:11:55,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960709021] [2020-11-11 15:11:55,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:11:55,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:55,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:11:55,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:55,227 INFO L87 Difference]: Start difference. First operand 1987 states and 5436 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 15:11:55,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:55,708 INFO L93 Difference]: Finished difference Result 2955 states and 7500 transitions. [2020-11-11 15:11:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:11:55,709 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 15:11:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:55,712 INFO L225 Difference]: With dead ends: 2955 [2020-11-11 15:11:55,712 INFO L226 Difference]: Without dead ends: 2685 [2020-11-11 15:11:55,713 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 15:11:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2020-11-11 15:11:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1987. [2020-11-11 15:11:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 2.7371601208459215) internal successors, (5436), 1986 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:55,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 5436 transitions. [2020-11-11 15:11:55,739 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 5436 transitions. Word has length 76 [2020-11-11 15:11:55,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:55,739 INFO L481 AbstractCegarLoop]: Abstraction has 1987 states and 5436 transitions. [2020-11-11 15:11:55,740 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 15:11:55,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 5436 transitions. [2020-11-11 15:11:55,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:55,742 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:55,743 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 15:11:55,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-11 15:11:55,943 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:55,944 INFO L82 PathProgramCache]: Analyzing trace with hash -319222121, now seen corresponding path program 44 times [2020-11-11 15:11:55,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:55,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883291184] [2020-11-11 15:11:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:56,152 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 15:11:56,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883291184] [2020-11-11 15:11:56,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269306891] [2020-11-11 15:11:56,153 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 15:11:56,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:11:56,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:56,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:56,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:56,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:56,281 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 15:11:56,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:56,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:11:56,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075997421] [2020-11-11 15:11:56,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:11:56,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:56,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:11:56,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:56,283 INFO L87 Difference]: Start difference. First operand 1987 states and 5436 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 15:11:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:56,718 INFO L93 Difference]: Finished difference Result 2930 states and 7450 transitions. [2020-11-11 15:11:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 15:11:56,718 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 15:11:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:56,723 INFO L225 Difference]: With dead ends: 2930 [2020-11-11 15:11:56,723 INFO L226 Difference]: Without dead ends: 2660 [2020-11-11 15:11:56,723 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 15:11:56,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2020-11-11 15:11:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 1987. [2020-11-11 15:11:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 2.7371601208459215) internal successors, (5436), 1986 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 5436 transitions. [2020-11-11 15:11:56,756 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 5436 transitions. Word has length 76 [2020-11-11 15:11:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:56,756 INFO L481 AbstractCegarLoop]: Abstraction has 1987 states and 5436 transitions. [2020-11-11 15:11:56,756 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 15:11:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 5436 transitions. [2020-11-11 15:11:56,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:56,759 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:56,759 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 15:11:56,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-11 15:11:56,960 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:56,961 INFO L82 PathProgramCache]: Analyzing trace with hash 509489031, now seen corresponding path program 45 times [2020-11-11 15:11:56,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:56,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275719550] [2020-11-11 15:11:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:57,176 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 15:11:57,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275719550] [2020-11-11 15:11:57,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444480592] [2020-11-11 15:11:57,176 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 15:11:57,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 15:11:57,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:57,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:57,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:57,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:57,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:57,330 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 15:11:57,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:57,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:11:57,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469193112] [2020-11-11 15:11:57,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:11:57,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:57,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:11:57,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:57,332 INFO L87 Difference]: Start difference. First operand 1987 states and 5436 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 15:11:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:57,946 INFO L93 Difference]: Finished difference Result 2880 states and 7350 transitions. [2020-11-11 15:11:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:11:57,946 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 15:11:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:57,950 INFO L225 Difference]: With dead ends: 2880 [2020-11-11 15:11:57,950 INFO L226 Difference]: Without dead ends: 2610 [2020-11-11 15:11:57,950 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 15:11:57,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2020-11-11 15:11:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 1987. [2020-11-11 15:11:57,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 2.7371601208459215) internal successors, (5436), 1986 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 5436 transitions. [2020-11-11 15:11:57,974 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 5436 transitions. Word has length 76 [2020-11-11 15:11:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:57,975 INFO L481 AbstractCegarLoop]: Abstraction has 1987 states and 5436 transitions. [2020-11-11 15:11:57,975 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 15:11:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 5436 transitions. [2020-11-11 15:11:57,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:57,977 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:57,977 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 15:11:58,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:11:58,178 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:58,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:58,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1213049515, now seen corresponding path program 46 times [2020-11-11 15:11:58,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:58,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119604616] [2020-11-11 15:11:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:58,376 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 15:11:58,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119604616] [2020-11-11 15:11:58,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968854321] [2020-11-11 15:11:58,377 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 15:11:58,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:11:58,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:58,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:11:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:58,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:58,508 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 15:11:58,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:58,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:11:58,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621575036] [2020-11-11 15:11:58,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:11:58,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:58,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:11:58,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:11:58,509 INFO L87 Difference]: Start difference. First operand 1987 states and 5436 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 15:11:59,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:11:59,002 INFO L93 Difference]: Finished difference Result 2830 states and 7250 transitions. [2020-11-11 15:11:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:11:59,003 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 15:11:59,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:11:59,007 INFO L225 Difference]: With dead ends: 2830 [2020-11-11 15:11:59,007 INFO L226 Difference]: Without dead ends: 2560 [2020-11-11 15:11:59,007 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 15:11:59,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2020-11-11 15:11:59,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1987. [2020-11-11 15:11:59,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 2.7371601208459215) internal successors, (5436), 1986 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:11:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 5436 transitions. [2020-11-11 15:11:59,031 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 5436 transitions. Word has length 76 [2020-11-11 15:11:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:11:59,031 INFO L481 AbstractCegarLoop]: Abstraction has 1987 states and 5436 transitions. [2020-11-11 15:11:59,031 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 15:11:59,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 5436 transitions. [2020-11-11 15:11:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:11:59,033 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:11:59,033 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 15:11:59,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-11 15:11:59,234 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:11:59,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:11:59,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1542382149, now seen corresponding path program 47 times [2020-11-11 15:11:59,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:11:59,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013446115] [2020-11-11 15:11:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:11:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:11:59,427 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 15:11:59,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013446115] [2020-11-11 15:11:59,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811960694] [2020-11-11 15:11:59,428 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 15:11:59,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:11:59,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:11:59,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:11:59,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:11:59,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:11:59,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:11:59,573 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 15:11:59,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:11:59,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:11:59,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229984180] [2020-11-11 15:11:59,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:11:59,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:11:59,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:11:59,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:11:59,575 INFO L87 Difference]: Start difference. First operand 1987 states and 5436 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 15:12:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:00,263 INFO L93 Difference]: Finished difference Result 2780 states and 7150 transitions. [2020-11-11 15:12:00,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:12:00,264 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 15:12:00,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:00,268 INFO L225 Difference]: With dead ends: 2780 [2020-11-11 15:12:00,268 INFO L226 Difference]: Without dead ends: 2510 [2020-11-11 15:12:00,268 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:12:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2020-11-11 15:12:00,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 1987. [2020-11-11 15:12:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 2.7371601208459215) internal successors, (5436), 1986 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 5436 transitions. [2020-11-11 15:12:00,297 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 5436 transitions. Word has length 76 [2020-11-11 15:12:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:00,297 INFO L481 AbstractCegarLoop]: Abstraction has 1987 states and 5436 transitions. [2020-11-11 15:12:00,297 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 15:12:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 5436 transitions. [2020-11-11 15:12:00,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:00,300 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:00,301 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 15:12:00,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-11 15:12:00,503 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:00,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:00,503 INFO L82 PathProgramCache]: Analyzing trace with hash 185815443, now seen corresponding path program 48 times [2020-11-11 15:12:00,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:00,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549753193] [2020-11-11 15:12:00,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:00,690 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 15:12:00,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549753193] [2020-11-11 15:12:00,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650017842] [2020-11-11 15:12:00,691 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 15:12:00,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:12:00,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:00,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:00,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:00,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:00,830 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 15:12:00,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:00,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:12:00,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006570080] [2020-11-11 15:12:00,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:12:00,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:00,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:12:00,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:12:00,832 INFO L87 Difference]: Start difference. First operand 1987 states and 5436 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 15:12:01,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:01,396 INFO L93 Difference]: Finished difference Result 2730 states and 7050 transitions. [2020-11-11 15:12:01,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:12:01,397 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 15:12:01,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:01,400 INFO L225 Difference]: With dead ends: 2730 [2020-11-11 15:12:01,400 INFO L226 Difference]: Without dead ends: 2460 [2020-11-11 15:12:01,400 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:12:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2020-11-11 15:12:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1987. [2020-11-11 15:12:01,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 2.7371601208459215) internal successors, (5436), 1986 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 5436 transitions. [2020-11-11 15:12:01,427 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 5436 transitions. Word has length 76 [2020-11-11 15:12:01,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:01,427 INFO L481 AbstractCegarLoop]: Abstraction has 1987 states and 5436 transitions. [2020-11-11 15:12:01,427 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 15:12:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 5436 transitions. [2020-11-11 15:12:01,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:01,430 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:01,430 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 15:12:01,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-11 15:12:01,644 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:01,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:01,644 INFO L82 PathProgramCache]: Analyzing trace with hash 2017348227, now seen corresponding path program 49 times [2020-11-11 15:12:01,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:01,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066231368] [2020-11-11 15:12:01,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:01,821 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 15:12:01,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066231368] [2020-11-11 15:12:01,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325832309] [2020-11-11 15:12:01,821 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 15:12:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:01,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:01,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:01,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:01,956 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:01,968 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 15:12:01,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:01,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:12:01,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418341235] [2020-11-11 15:12:01,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:01,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:01,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:01,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:01,970 INFO L87 Difference]: Start difference. First operand 1987 states and 5436 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 15:12:02,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:02,842 INFO L93 Difference]: Finished difference Result 3109 states and 8084 transitions. [2020-11-11 15:12:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:12:02,843 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 15:12:02,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:02,846 INFO L225 Difference]: With dead ends: 3109 [2020-11-11 15:12:02,846 INFO L226 Difference]: Without dead ends: 2540 [2020-11-11 15:12:02,846 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:12:02,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2020-11-11 15:12:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 1927. [2020-11-11 15:12:02,870 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 15:12:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 5291 transitions. [2020-11-11 15:12:02,873 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 5291 transitions. Word has length 76 [2020-11-11 15:12:02,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:02,873 INFO L481 AbstractCegarLoop]: Abstraction has 1927 states and 5291 transitions. [2020-11-11 15:12:02,874 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 15:12:02,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 5291 transitions. [2020-11-11 15:12:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:02,875 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:02,875 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 15:12:03,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:03,076 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:03,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1648827567, now seen corresponding path program 50 times [2020-11-11 15:12:03,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:03,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246098905] [2020-11-11 15:12:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:03,239 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 15:12:03,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246098905] [2020-11-11 15:12:03,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389995448] [2020-11-11 15:12:03,240 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 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 15:12:03,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:03,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:03,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:03,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:03,349 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:03,356 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 15:12:03,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:03,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 15:12:03,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451772451] [2020-11-11 15:12:03,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 15:12:03,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:03,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 15:12:03,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-11 15:12:03,357 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 15:12:03,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:03,995 INFO L93 Difference]: Finished difference Result 3752 states and 10044 transitions. [2020-11-11 15:12:03,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:12:03,996 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 15:12:03,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:04,000 INFO L225 Difference]: With dead ends: 3752 [2020-11-11 15:12:04,000 INFO L226 Difference]: Without dead ends: 3482 [2020-11-11 15:12:04,000 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:12:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2020-11-11 15:12:04,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 2052. [2020-11-11 15:12:04,028 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 15:12:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5682 transitions. [2020-11-11 15:12:04,032 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5682 transitions. Word has length 76 [2020-11-11 15:12:04,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:04,033 INFO L481 AbstractCegarLoop]: Abstraction has 2052 states and 5682 transitions. [2020-11-11 15:12:04,033 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 15:12:04,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5682 transitions. [2020-11-11 15:12:04,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-11 15:12:04,036 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:04,036 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 15:12:04,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:04,252 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:04,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:04,252 INFO L82 PathProgramCache]: Analyzing trace with hash 62380387, now seen corresponding path program 51 times [2020-11-11 15:12:04,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:04,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538356892] [2020-11-11 15:12:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:04,424 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 15:12:04,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538356892] [2020-11-11 15:12:04,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325754565] [2020-11-11 15:12:04,428 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 15:12:04,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 15:12:04,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:04,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 15:12:04,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:04,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:04,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:04,567 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 15:12:04,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:04,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-11 15:12:04,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391651397] [2020-11-11 15:12:04,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:04,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:04,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:04,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:04,570 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 15:12:05,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:05,759 INFO L93 Difference]: Finished difference Result 3207 states and 8440 transitions. [2020-11-11 15:12:05,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:12:05,760 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 15:12:05,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:05,764 INFO L225 Difference]: With dead ends: 3207 [2020-11-11 15:12:05,765 INFO L226 Difference]: Without dead ends: 2680 [2020-11-11 15:12:05,765 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:12:05,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2020-11-11 15:12:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2062. [2020-11-11 15:12:05,804 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 15:12:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:05,810 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 76 [2020-11-11 15:12:05,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:05,811 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:05,812 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 15:12:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:05,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:05,814 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:05,815 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 15:12:06,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:06,029 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:06,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1380054286, now seen corresponding path program 52 times [2020-11-11 15:12:06,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:06,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336014109] [2020-11-11 15:12:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:06,269 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 15:12:06,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336014109] [2020-11-11 15:12:06,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657557294] [2020-11-11 15:12:06,269 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 15:12:06,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:06,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:06,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:06,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:06,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:06,388 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 15:12:06,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:06,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:12:06,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654821060] [2020-11-11 15:12:06,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:06,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:06,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:06,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:06,391 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 15:12:06,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:06,871 INFO L93 Difference]: Finished difference Result 2905 states and 7500 transitions. [2020-11-11 15:12:06,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:12:06,871 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 15:12:06,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:06,875 INFO L225 Difference]: With dead ends: 2905 [2020-11-11 15:12:06,875 INFO L226 Difference]: Without dead ends: 2635 [2020-11-11 15:12:06,876 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 15:12:06,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2020-11-11 15:12:06,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2062. [2020-11-11 15:12:06,901 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 15:12:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:06,905 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:12:06,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:06,905 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:06,905 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 15:12:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:06,908 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:06,908 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 15:12:07,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:07,108 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:07,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:07,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1369620450, now seen corresponding path program 53 times [2020-11-11 15:12:07,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:07,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626827042] [2020-11-11 15:12:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:07,345 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 15:12:07,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626827042] [2020-11-11 15:12:07,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529850864] [2020-11-11 15:12:07,346 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 15:12:07,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:12:07,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:07,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:07,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:07,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:07,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:07,534 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 15:12:07,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:07,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:12:07,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811206893] [2020-11-11 15:12:07,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:07,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:07,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:07,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:07,536 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 15:12:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:08,099 INFO L93 Difference]: Finished difference Result 3100 states and 7890 transitions. [2020-11-11 15:12:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:12:08,100 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 15:12:08,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:08,103 INFO L225 Difference]: With dead ends: 3100 [2020-11-11 15:12:08,103 INFO L226 Difference]: Without dead ends: 2830 [2020-11-11 15:12:08,103 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 15:12:08,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2020-11-11 15:12:08,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2062. [2020-11-11 15:12:08,127 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 15:12:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:08,130 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:12:08,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:08,131 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:08,131 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 15:12:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:08,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:08,133 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:08,133 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 15:12:08,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-11-11 15:12:08,335 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:08,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:08,336 INFO L82 PathProgramCache]: Analyzing trace with hash 802454576, now seen corresponding path program 54 times [2020-11-11 15:12:08,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:08,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017794711] [2020-11-11 15:12:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:08,570 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 15:12:08,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017794711] [2020-11-11 15:12:08,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283769535] [2020-11-11 15:12:08,571 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 15:12:08,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:12:08,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:08,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:08,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:08,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:08,701 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 15:12:08,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:08,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:12:08,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723319200] [2020-11-11 15:12:08,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:08,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:08,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:08,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:08,703 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 15:12:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:09,216 INFO L93 Difference]: Finished difference Result 3055 states and 7800 transitions. [2020-11-11 15:12:09,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:12:09,217 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 15:12:09,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:09,221 INFO L225 Difference]: With dead ends: 3055 [2020-11-11 15:12:09,221 INFO L226 Difference]: Without dead ends: 2785 [2020-11-11 15:12:09,221 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 15:12:09,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2020-11-11 15:12:09,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2062. [2020-11-11 15:12:09,245 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 15:12:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:09,248 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:12:09,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:09,248 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:09,249 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 15:12:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:09,250 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:09,250 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 15:12:09,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:09,451 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:09,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1631165728, now seen corresponding path program 55 times [2020-11-11 15:12:09,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:09,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587304048] [2020-11-11 15:12:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:09,709 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 15:12:09,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587304048] [2020-11-11 15:12:09,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568639899] [2020-11-11 15:12:09,710 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 15:12:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:09,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:09,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:09,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:09,907 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:09,922 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 15:12:09,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:09,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:12:09,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35610847] [2020-11-11 15:12:09,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:09,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:09,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:09,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:09,924 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 15:12:10,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:10,689 INFO L93 Difference]: Finished difference Result 3005 states and 7700 transitions. [2020-11-11 15:12:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:12:10,689 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 15:12:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:10,692 INFO L225 Difference]: With dead ends: 3005 [2020-11-11 15:12:10,692 INFO L226 Difference]: Without dead ends: 2735 [2020-11-11 15:12:10,692 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 15:12:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2020-11-11 15:12:10,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2062. [2020-11-11 15:12:10,719 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 15:12:10,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:10,725 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:12:10,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:10,725 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:10,725 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 15:12:10,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:10,728 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:10,728 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 15:12:10,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-11-11 15:12:10,934 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:10,935 INFO L82 PathProgramCache]: Analyzing trace with hash -91372818, now seen corresponding path program 56 times [2020-11-11 15:12:10,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:10,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888973792] [2020-11-11 15:12:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:11,148 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 15:12:11,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888973792] [2020-11-11 15:12:11,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045182104] [2020-11-11 15:12:11,149 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 15:12:11,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:11,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:11,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:11,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:11,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:11,274 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 15:12:11,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:11,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:12:11,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869056148] [2020-11-11 15:12:11,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:11,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:11,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:11,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:11,277 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 15:12:11,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:11,865 INFO L93 Difference]: Finished difference Result 2955 states and 7600 transitions. [2020-11-11 15:12:11,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:12:11,866 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 15:12:11,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:11,870 INFO L225 Difference]: With dead ends: 2955 [2020-11-11 15:12:11,870 INFO L226 Difference]: Without dead ends: 2685 [2020-11-11 15:12:11,870 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 15:12:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2020-11-11 15:12:11,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2062. [2020-11-11 15:12:11,901 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 15:12:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:11,905 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:12:11,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:11,905 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:11,905 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 15:12:11,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:11,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:11,907 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:11,907 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 15:12:12,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:12,115 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:12,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:12,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1630908450, now seen corresponding path program 57 times [2020-11-11 15:12:12,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:12,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961354606] [2020-11-11 15:12:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:12,354 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 15:12:12,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961354606] [2020-11-11 15:12:12,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615215456] [2020-11-11 15:12:12,355 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 15:12:12,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 15:12:12,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:12,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:12,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:12,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:12,499 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:12,509 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 15:12:12,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:12,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:12:12,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289912066] [2020-11-11 15:12:12,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:12,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:12,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:12,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:12,510 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 15:12:13,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:13,282 INFO L93 Difference]: Finished difference Result 2905 states and 7500 transitions. [2020-11-11 15:12:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:12:13,282 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 15:12:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:13,286 INFO L225 Difference]: With dead ends: 2905 [2020-11-11 15:12:13,286 INFO L226 Difference]: Without dead ends: 2635 [2020-11-11 15:12:13,287 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 15:12:13,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2020-11-11 15:12:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2062. [2020-11-11 15:12:13,310 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 15:12:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:13,313 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:12:13,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:13,314 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:13,314 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 15:12:13,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:13,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:13,316 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:13,316 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 15:12:13,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-11-11 15:12:13,518 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:13,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:13,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1307492140, now seen corresponding path program 58 times [2020-11-11 15:12:13,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:13,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92481747] [2020-11-11 15:12:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:13,727 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 15:12:13,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92481747] [2020-11-11 15:12:13,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358608382] [2020-11-11 15:12:13,727 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 15:12:13,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:13,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:13,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:13,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:13,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:13,871 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 15:12:13,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:13,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:12:13,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660920218] [2020-11-11 15:12:13,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:13,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:13,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:13,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:13,873 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 15:12:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:14,540 INFO L93 Difference]: Finished difference Result 2855 states and 7400 transitions. [2020-11-11 15:12:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:12:14,540 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 15:12:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:14,544 INFO L225 Difference]: With dead ends: 2855 [2020-11-11 15:12:14,544 INFO L226 Difference]: Without dead ends: 2585 [2020-11-11 15:12:14,544 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 15:12:14,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2020-11-11 15:12:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2062. [2020-11-11 15:12:14,569 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 15:12:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5686 transitions. [2020-11-11 15:12:14,573 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5686 transitions. Word has length 81 [2020-11-11 15:12:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:14,573 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5686 transitions. [2020-11-11 15:12:14,573 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 15:12:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5686 transitions. [2020-11-11 15:12:14,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:14,575 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:14,575 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 15:12:14,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:14,777 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:14,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1155942372, now seen corresponding path program 59 times [2020-11-11 15:12:14,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:14,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742991290] [2020-11-11 15:12:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:14,978 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 15:12:14,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742991290] [2020-11-11 15:12:14,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686472882] [2020-11-11 15:12:14,979 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 15:12:15,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 15:12:15,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:15,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:15,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:15,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:15,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:15,138 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 15:12:15,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:15,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:12:15,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218335371] [2020-11-11 15:12:15,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:15,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:15,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:15,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:15,140 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 15:12:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:15,986 INFO L93 Difference]: Finished difference Result 2850 states and 7410 transitions. [2020-11-11 15:12:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:12:15,986 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 15:12:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:15,991 INFO L225 Difference]: With dead ends: 2850 [2020-11-11 15:12:15,991 INFO L226 Difference]: Without dead ends: 2580 [2020-11-11 15:12:15,992 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:12:15,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2020-11-11 15:12:16,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2062. [2020-11-11 15:12:16,024 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 15:12:16,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 5691 transitions. [2020-11-11 15:12:16,030 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 5691 transitions. Word has length 81 [2020-11-11 15:12:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:16,030 INFO L481 AbstractCegarLoop]: Abstraction has 2062 states and 5691 transitions. [2020-11-11 15:12:16,031 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 15:12:16,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 5691 transitions. [2020-11-11 15:12:16,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:16,034 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:16,035 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 15:12:16,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:16,241 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:16,241 INFO L82 PathProgramCache]: Analyzing trace with hash -527150870, now seen corresponding path program 60 times [2020-11-11 15:12:16,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:16,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165628832] [2020-11-11 15:12:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:16,432 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 15:12:16,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165628832] [2020-11-11 15:12:16,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450359213] [2020-11-11 15:12:16,432 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 15:12:16,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 15:12:16,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:16,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:16,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:16,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:16,565 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 15:12:16,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:16,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 15:12:16,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526411888] [2020-11-11 15:12:16,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 15:12:16,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:16,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 15:12:16,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-11-11 15:12:16,567 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 15:12:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:17,299 INFO L93 Difference]: Finished difference Result 3912 states and 10494 transitions. [2020-11-11 15:12:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:12:17,299 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 15:12:17,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:17,304 INFO L225 Difference]: With dead ends: 3912 [2020-11-11 15:12:17,304 INFO L226 Difference]: Without dead ends: 3642 [2020-11-11 15:12:17,304 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:12:17,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3642 states. [2020-11-11 15:12:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3642 to 2187. [2020-11-11 15:12:17,332 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 15:12:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 6082 transitions. [2020-11-11 15:12:17,336 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 6082 transitions. Word has length 81 [2020-11-11 15:12:17,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:17,336 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 6082 transitions. [2020-11-11 15:12:17,336 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 15:12:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 6082 transitions. [2020-11-11 15:12:17,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-11-11 15:12:17,338 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:17,338 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 15:12:17,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-11-11 15:12:17,539 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:17,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:17,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1184057084, now seen corresponding path program 61 times [2020-11-11 15:12:17,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:17,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740759595] [2020-11-11 15:12:17,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:17,740 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 15:12:17,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740759595] [2020-11-11 15:12:17,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730557218] [2020-11-11 15:12:17,740 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 15:12:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:17,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 15:12:17,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:17,848 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:17,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:17,884 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 15:12:17,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:17,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-11 15:12:17,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029602898] [2020-11-11 15:12:17,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:17,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:17,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:17,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:17,886 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 15:12:18,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:18,866 INFO L93 Difference]: Finished difference Result 3307 states and 8740 transitions. [2020-11-11 15:12:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:12:18,867 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 15:12:18,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:18,870 INFO L225 Difference]: With dead ends: 3307 [2020-11-11 15:12:18,870 INFO L226 Difference]: Without dead ends: 2780 [2020-11-11 15:12:18,871 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:12:18,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2020-11-11 15:12:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 1601. [2020-11-11 15:12:18,892 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 15:12:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 4318 transitions. [2020-11-11 15:12:18,894 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 4318 transitions. Word has length 81 [2020-11-11 15:12:18,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:18,894 INFO L481 AbstractCegarLoop]: Abstraction has 1601 states and 4318 transitions. [2020-11-11 15:12:18,894 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 15:12:18,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 4318 transitions. [2020-11-11 15:12:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:18,896 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:18,896 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 15:12:19,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:19,097 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:19,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1440295804, now seen corresponding path program 62 times [2020-11-11 15:12:19,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:19,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111715577] [2020-11-11 15:12:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:19,382 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 15:12:19,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111715577] [2020-11-11 15:12:19,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83182438] [2020-11-11 15:12:19,383 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 15:12:19,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:19,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:19,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:19,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:19,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:19,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:19,551 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 15:12:19,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:19,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2020-11-11 15:12:19,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062779652] [2020-11-11 15:12:19,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:12:19,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:19,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:12:19,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:12:19,553 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 15:12:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:20,154 INFO L93 Difference]: Finished difference Result 2669 states and 6902 transitions. [2020-11-11 15:12:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:12:20,155 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 15:12:20,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:20,159 INFO L225 Difference]: With dead ends: 2669 [2020-11-11 15:12:20,159 INFO L226 Difference]: Without dead ends: 2335 [2020-11-11 15:12:20,159 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 15:12:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2020-11-11 15:12:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 1686. [2020-11-11 15:12:20,194 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 15:12:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 4488 transitions. [2020-11-11 15:12:20,197 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 4488 transitions. Word has length 86 [2020-11-11 15:12:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:20,197 INFO L481 AbstractCegarLoop]: Abstraction has 1686 states and 4488 transitions. [2020-11-11 15:12:20,197 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 15:12:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 4488 transitions. [2020-11-11 15:12:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:20,198 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:20,199 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 15:12:20,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:20,399 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:20,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:20,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1109041322, now seen corresponding path program 63 times [2020-11-11 15:12:20,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:20,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322304516] [2020-11-11 15:12:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:20,666 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 15:12:20,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322304516] [2020-11-11 15:12:20,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475304276] [2020-11-11 15:12:20,666 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 15:12:20,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:12:20,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:20,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:20,805 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:20,820 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 15:12:20,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:20,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:12:20,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53125537] [2020-11-11 15:12:20,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:20,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:20,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:20,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:20,822 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 15:12:21,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:21,276 INFO L93 Difference]: Finished difference Result 3020 states and 7370 transitions. [2020-11-11 15:12:21,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 15:12:21,277 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 15:12:21,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:21,282 INFO L225 Difference]: With dead ends: 3020 [2020-11-11 15:12:21,282 INFO L226 Difference]: Without dead ends: 2750 [2020-11-11 15:12:21,282 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 15:12:21,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2020-11-11 15:12:21,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1787. [2020-11-11 15:12:21,306 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 15:12:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 4776 transitions. [2020-11-11 15:12:21,309 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 4776 transitions. Word has length 86 [2020-11-11 15:12:21,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:21,309 INFO L481 AbstractCegarLoop]: Abstraction has 1787 states and 4776 transitions. [2020-11-11 15:12:21,310 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 15:12:21,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 4776 transitions. [2020-11-11 15:12:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:21,311 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:21,311 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 15:12:21,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-11-11 15:12:21,512 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:21,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1122637414, now seen corresponding path program 64 times [2020-11-11 15:12:21,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:21,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252011605] [2020-11-11 15:12:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:21,788 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 15:12:21,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252011605] [2020-11-11 15:12:21,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246723192] [2020-11-11 15:12:21,789 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 15:12:21,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:21,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:21,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:21,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:21,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:21,931 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:21,946 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 15:12:21,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:21,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:12:21,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519326576] [2020-11-11 15:12:21,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:21,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:21,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:21,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:21,947 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 15:12:22,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:22,526 INFO L93 Difference]: Finished difference Result 2955 states and 7290 transitions. [2020-11-11 15:12:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:12:22,527 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 15:12:22,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:22,530 INFO L225 Difference]: With dead ends: 2955 [2020-11-11 15:12:22,531 INFO L226 Difference]: Without dead ends: 2685 [2020-11-11 15:12:22,531 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:12:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2020-11-11 15:12:22,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1837. [2020-11-11 15:12:22,555 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 15:12:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 4926 transitions. [2020-11-11 15:12:22,558 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 4926 transitions. Word has length 86 [2020-11-11 15:12:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:22,558 INFO L481 AbstractCegarLoop]: Abstraction has 1837 states and 4926 transitions. [2020-11-11 15:12:22,558 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 15:12:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 4926 transitions. [2020-11-11 15:12:22,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:22,560 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:22,561 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 15:12:22,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:22,775 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:22,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1560601496, now seen corresponding path program 65 times [2020-11-11 15:12:22,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:22,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980051804] [2020-11-11 15:12:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:23,022 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 15:12:23,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980051804] [2020-11-11 15:12:23,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784163146] [2020-11-11 15:12:23,023 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 15:12:23,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:12:23,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:23,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:23,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:23,134 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:23,152 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 15:12:23,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:23,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:12:23,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258727629] [2020-11-11 15:12:23,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:23,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:23,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:23,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:23,153 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 15:12:23,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:23,688 INFO L93 Difference]: Finished difference Result 2980 states and 7390 transitions. [2020-11-11 15:12:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 15:12:23,689 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 15:12:23,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:23,692 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:12:23,692 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:12:23,693 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2020-11-11 15:12:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:12:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1887. [2020-11-11 15:12:23,716 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 15:12:23,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5076 transitions. [2020-11-11 15:12:23,719 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5076 transitions. Word has length 86 [2020-11-11 15:12:23,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:23,719 INFO L481 AbstractCegarLoop]: Abstraction has 1887 states and 5076 transitions. [2020-11-11 15:12:23,719 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 15:12:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5076 transitions. [2020-11-11 15:12:23,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:23,720 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:23,720 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 15:12:23,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-11-11 15:12:23,921 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:23,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:23,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1189073240, now seen corresponding path program 66 times [2020-11-11 15:12:23,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:23,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165227375] [2020-11-11 15:12:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:24,187 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 15:12:24,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165227375] [2020-11-11 15:12:24,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351705180] [2020-11-11 15:12:24,188 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 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 15:12:24,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:12:24,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:24,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:24,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:24,304 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:24,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:24,355 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 15:12:24,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:24,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:12:24,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313153883] [2020-11-11 15:12:24,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:24,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:24,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:24,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:24,356 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 15:12:25,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:25,064 INFO L93 Difference]: Finished difference Result 2980 states and 7440 transitions. [2020-11-11 15:12:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:12:25,065 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 15:12:25,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:25,069 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:12:25,069 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:12:25,069 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 15:12:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:12:25,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1937. [2020-11-11 15:12:25,093 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 15:12:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 5226 transitions. [2020-11-11 15:12:25,096 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 5226 transitions. Word has length 86 [2020-11-11 15:12:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:25,096 INFO L481 AbstractCegarLoop]: Abstraction has 1937 states and 5226 transitions. [2020-11-11 15:12:25,096 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 15:12:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 5226 transitions. [2020-11-11 15:12:25,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:25,098 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:25,098 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 15:12:25,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-11 15:12:25,299 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:25,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:25,300 INFO L82 PathProgramCache]: Analyzing trace with hash 621907366, now seen corresponding path program 67 times [2020-11-11 15:12:25,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:25,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483880857] [2020-11-11 15:12:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:25,532 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 15:12:25,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483880857] [2020-11-11 15:12:25,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306782595] [2020-11-11 15:12:25,533 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 15:12:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:25,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:25,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:25,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:25,664 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 15:12:25,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:25,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:12:25,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144217264] [2020-11-11 15:12:25,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:25,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:25,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:25,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:25,665 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 15:12:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:26,271 INFO L93 Difference]: Finished difference Result 2980 states and 7490 transitions. [2020-11-11 15:12:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:12:26,271 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 15:12:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:26,276 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:12:26,276 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:12:26,276 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 15:12:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:12:26,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1987. [2020-11-11 15:12:26,303 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 15:12:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 5376 transitions. [2020-11-11 15:12:26,307 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 5376 transitions. Word has length 86 [2020-11-11 15:12:26,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:26,307 INFO L481 AbstractCegarLoop]: Abstraction has 1987 states and 5376 transitions. [2020-11-11 15:12:26,307 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 15:12:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 5376 transitions. [2020-11-11 15:12:26,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:26,327 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:26,327 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 15:12:26,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-11-11 15:12:26,537 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:26,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:26,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1450618518, now seen corresponding path program 68 times [2020-11-11 15:12:26,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:26,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346250620] [2020-11-11 15:12:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:26,792 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 15:12:26,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346250620] [2020-11-11 15:12:26,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337696789] [2020-11-11 15:12:26,792 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 15:12:26,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:26,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:26,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:26,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:26,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:26,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:26,944 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 15:12:26,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:26,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:12:26,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832615372] [2020-11-11 15:12:26,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:26,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:26,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:26,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:26,946 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 15:12:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:27,747 INFO L93 Difference]: Finished difference Result 2980 states and 7540 transitions. [2020-11-11 15:12:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:12:27,747 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 15:12:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:27,751 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:12:27,751 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:12:27,752 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:12:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:12:27,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2037. [2020-11-11 15:12:27,781 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 15:12:27,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 5526 transitions. [2020-11-11 15:12:27,784 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 5526 transitions. Word has length 86 [2020-11-11 15:12:27,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:27,784 INFO L481 AbstractCegarLoop]: Abstraction has 2037 states and 5526 transitions. [2020-11-11 15:12:27,784 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 15:12:27,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 5526 transitions. [2020-11-11 15:12:27,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:27,786 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:27,786 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 15:12:27,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:27,987 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:27,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:27,988 INFO L82 PathProgramCache]: Analyzing trace with hash -271920028, now seen corresponding path program 69 times [2020-11-11 15:12:27,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:27,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799089830] [2020-11-11 15:12:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:28,233 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 15:12:28,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799089830] [2020-11-11 15:12:28,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137851326] [2020-11-11 15:12:28,233 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 15:12:28,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:12:28,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:28,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:28,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:28,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:28,379 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 15:12:28,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:28,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:12:28,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598013409] [2020-11-11 15:12:28,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:28,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:28,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:28,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:28,381 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 15:12:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:29,040 INFO L93 Difference]: Finished difference Result 2980 states and 7590 transitions. [2020-11-11 15:12:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:12:29,041 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 15:12:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:29,045 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:12:29,045 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:12:29,047 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=366, Invalid=1116, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 15:12:29,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:12:29,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2087. [2020-11-11 15:12:29,079 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 15:12:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 5676 transitions. [2020-11-11 15:12:29,083 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 5676 transitions. Word has length 86 [2020-11-11 15:12:29,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:29,083 INFO L481 AbstractCegarLoop]: Abstraction has 2087 states and 5676 transitions. [2020-11-11 15:12:29,083 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 15:12:29,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 5676 transitions. [2020-11-11 15:12:29,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:29,085 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:29,085 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 15:12:29,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:29,286 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:29,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1811455660, now seen corresponding path program 70 times [2020-11-11 15:12:29,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:29,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012441279] [2020-11-11 15:12:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:29,519 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 15:12:29,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012441279] [2020-11-11 15:12:29,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728939619] [2020-11-11 15:12:29,519 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 15:12:29,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:29,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:29,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:29,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:29,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:29,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:29,697 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 15:12:29,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:29,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:12:29,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199390040] [2020-11-11 15:12:29,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:29,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:29,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:29,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:29,699 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 15:12:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:30,599 INFO L93 Difference]: Finished difference Result 2980 states and 7640 transitions. [2020-11-11 15:12:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:12:30,600 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 15:12:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:30,603 INFO L225 Difference]: With dead ends: 2980 [2020-11-11 15:12:30,603 INFO L226 Difference]: Without dead ends: 2710 [2020-11-11 15:12:30,603 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=443, Invalid=1363, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 15:12:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2020-11-11 15:12:30,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2137. [2020-11-11 15:12:30,629 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 15:12:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 5826 transitions. [2020-11-11 15:12:30,633 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 5826 transitions. Word has length 86 [2020-11-11 15:12:30,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:30,633 INFO L481 AbstractCegarLoop]: Abstraction has 2137 states and 5826 transitions. [2020-11-11 15:12:30,633 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 15:12:30,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 5826 transitions. [2020-11-11 15:12:30,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:30,635 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:30,635 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 15:12:30,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:30,836 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:30,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:30,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1126944930, now seen corresponding path program 71 times [2020-11-11 15:12:30,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:30,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444310025] [2020-11-11 15:12:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:31,057 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 15:12:31,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444310025] [2020-11-11 15:12:31,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279045964] [2020-11-11 15:12:31,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:12:31,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:12:31,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:31,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:31,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:31,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:31,187 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 15:12:31,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:31,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:12:31,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085351141] [2020-11-11 15:12:31,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:31,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:31,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:31,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:31,189 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 15:12:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:31,939 INFO L93 Difference]: Finished difference Result 3010 states and 7765 transitions. [2020-11-11 15:12:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:12:31,939 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 15:12:31,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:31,943 INFO L225 Difference]: With dead ends: 3010 [2020-11-11 15:12:31,943 INFO L226 Difference]: Without dead ends: 2740 [2020-11-11 15:12:31,943 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 15:12:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2020-11-11 15:12:31,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 2187. [2020-11-11 15:12:31,968 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 15:12:31,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 5986 transitions. [2020-11-11 15:12:31,972 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 5986 transitions. Word has length 86 [2020-11-11 15:12:31,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:31,972 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 5986 transitions. [2020-11-11 15:12:31,972 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 15:12:31,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 5986 transitions. [2020-11-11 15:12:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:31,973 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:31,974 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 15:12:32,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:32,174 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:32,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:32,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1336489582, now seen corresponding path program 72 times [2020-11-11 15:12:32,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:32,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178677408] [2020-11-11 15:12:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:32,411 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 15:12:32,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178677408] [2020-11-11 15:12:32,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595509660] [2020-11-11 15:12:32,411 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 15:12:32,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:12:32,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:32,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:32,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:32,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:32,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:32,558 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 15:12:32,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:32,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-11 15:12:32,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284413948] [2020-11-11 15:12:32,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:32,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:32,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:32,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:32,561 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 15:12:33,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:33,650 INFO L93 Difference]: Finished difference Result 3469 states and 9034 transitions. [2020-11-11 15:12:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:12:33,651 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 15:12:33,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:33,655 INFO L225 Difference]: With dead ends: 3469 [2020-11-11 15:12:33,655 INFO L226 Difference]: Without dead ends: 2900 [2020-11-11 15:12:33,656 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=534, Invalid=1628, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:12:33,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2020-11-11 15:12:33,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2237. [2020-11-11 15:12:33,683 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 15:12:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 6141 transitions. [2020-11-11 15:12:33,687 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 6141 transitions. Word has length 86 [2020-11-11 15:12:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:33,687 INFO L481 AbstractCegarLoop]: Abstraction has 2237 states and 6141 transitions. [2020-11-11 15:12:33,687 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 15:12:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 6141 transitions. [2020-11-11 15:12:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:33,689 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:33,689 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 15:12:33,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-11-11 15:12:33,890 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:33,891 INFO L82 PathProgramCache]: Analyzing trace with hash -707698080, now seen corresponding path program 73 times [2020-11-11 15:12:33,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:33,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256095360] [2020-11-11 15:12:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:34,105 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 15:12:34,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256095360] [2020-11-11 15:12:34,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278481135] [2020-11-11 15:12:34,105 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 15:12:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:34,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:34,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:34,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:34,230 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 15:12:34,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:34,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:12:34,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628530183] [2020-11-11 15:12:34,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:34,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:34,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:34,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:34,232 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 15:12:35,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:35,001 INFO L93 Difference]: Finished difference Result 4112 states and 10994 transitions. [2020-11-11 15:12:35,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:12:35,002 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 15:12:35,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:35,007 INFO L225 Difference]: With dead ends: 4112 [2020-11-11 15:12:35,007 INFO L226 Difference]: Without dead ends: 3842 [2020-11-11 15:12:35,008 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 15:12:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3842 states. [2020-11-11 15:12:35,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3842 to 2362. [2020-11-11 15:12:35,041 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 15:12:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 6532 transitions. [2020-11-11 15:12:35,045 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 6532 transitions. Word has length 86 [2020-11-11 15:12:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:35,045 INFO L481 AbstractCegarLoop]: Abstraction has 2362 states and 6532 transitions. [2020-11-11 15:12:35,045 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 15:12:35,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 6532 transitions. [2020-11-11 15:12:35,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-11 15:12:35,048 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:35,049 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 15:12:35,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:35,265 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:35,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1003509874, now seen corresponding path program 74 times [2020-11-11 15:12:35,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:35,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105181917] [2020-11-11 15:12:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:35,483 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 15:12:35,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105181917] [2020-11-11 15:12:35,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463702231] [2020-11-11 15:12:35,483 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 15:12:35,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:35,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:35,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 15:12:35,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:35,599 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:35,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:35,623 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 15:12:35,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:35,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 15:12:35,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358999583] [2020-11-11 15:12:35,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 15:12:35,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:35,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 15:12:35,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-11 15:12:35,625 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 15:12:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:36,650 INFO L93 Difference]: Finished difference Result 3151 states and 8350 transitions. [2020-11-11 15:12:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:12:36,651 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 15:12:36,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:36,654 INFO L225 Difference]: With dead ends: 3151 [2020-11-11 15:12:36,654 INFO L226 Difference]: Without dead ends: 2680 [2020-11-11 15:12:36,654 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:12:36,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2020-11-11 15:12:36,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 1752. [2020-11-11 15:12:36,678 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 15:12:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4726 transitions. [2020-11-11 15:12:36,681 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4726 transitions. Word has length 86 [2020-11-11 15:12:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:36,681 INFO L481 AbstractCegarLoop]: Abstraction has 1752 states and 4726 transitions. [2020-11-11 15:12:36,681 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 15:12:36,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4726 transitions. [2020-11-11 15:12:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:36,683 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:36,683 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 15:12:36,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:36,885 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:36,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1275110147, now seen corresponding path program 75 times [2020-11-11 15:12:36,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:36,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751433719] [2020-11-11 15:12:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:37,168 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 15:12:37,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751433719] [2020-11-11 15:12:37,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997644009] [2020-11-11 15:12:37,169 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 15:12:37,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:12:37,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:37,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:37,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:37,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:37,322 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 15:12:37,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:37,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:12:37,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533622412] [2020-11-11 15:12:37,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:37,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:37,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:37,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:37,324 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 15:12:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:37,879 INFO L93 Difference]: Finished difference Result 2745 states and 6890 transitions. [2020-11-11 15:12:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:12:37,879 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 15:12:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:37,882 INFO L225 Difference]: With dead ends: 2745 [2020-11-11 15:12:37,882 INFO L226 Difference]: Without dead ends: 2475 [2020-11-11 15:12:37,883 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=334, Invalid=998, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 15:12:37,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2020-11-11 15:12:37,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 1802. [2020-11-11 15:12:37,906 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 15:12:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 4876 transitions. [2020-11-11 15:12:37,909 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 4876 transitions. Word has length 91 [2020-11-11 15:12:37,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:37,909 INFO L481 AbstractCegarLoop]: Abstraction has 1802 states and 4876 transitions. [2020-11-11 15:12:37,909 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 15:12:37,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 4876 transitions. [2020-11-11 15:12:37,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:37,910 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:37,910 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 15:12:38,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:38,111 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:38,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:38,112 INFO L82 PathProgramCache]: Analyzing trace with hash -956568589, now seen corresponding path program 76 times [2020-11-11 15:12:38,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:38,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226418680] [2020-11-11 15:12:38,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:38,405 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 15:12:38,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226418680] [2020-11-11 15:12:38,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137205309] [2020-11-11 15:12:38,406 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 15:12:38,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:38,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:12:38,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:38,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:38,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:38,566 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 15:12:38,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:38,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:12:38,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808816362] [2020-11-11 15:12:38,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:38,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:38,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:38,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:38,568 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 15:12:39,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:39,252 INFO L93 Difference]: Finished difference Result 3040 states and 7530 transitions. [2020-11-11 15:12:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:12:39,257 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 15:12:39,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:39,260 INFO L225 Difference]: With dead ends: 3040 [2020-11-11 15:12:39,260 INFO L226 Difference]: Without dead ends: 2770 [2020-11-11 15:12:39,261 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:12:39,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2020-11-11 15:12:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1852. [2020-11-11 15:12:39,283 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 15:12:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5026 transitions. [2020-11-11 15:12:39,285 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5026 transitions. Word has length 91 [2020-11-11 15:12:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:39,286 INFO L481 AbstractCegarLoop]: Abstraction has 1852 states and 5026 transitions. [2020-11-11 15:12:39,286 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 15:12:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5026 transitions. [2020-11-11 15:12:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:39,287 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:39,287 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 15:12:39,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:39,488 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1394532671, now seen corresponding path program 77 times [2020-11-11 15:12:39,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:39,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629556139] [2020-11-11 15:12:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:39,752 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 15:12:39,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629556139] [2020-11-11 15:12:39,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061407090] [2020-11-11 15:12:39,752 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 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 15:12:39,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:12:39,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:39,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:39,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:39,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:39,885 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 15:12:39,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:39,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:12:39,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194198888] [2020-11-11 15:12:39,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:39,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:39,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:39,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:39,887 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 15:12:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:40,554 INFO L93 Difference]: Finished difference Result 3045 states and 7590 transitions. [2020-11-11 15:12:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:12:40,554 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 15:12:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:40,558 INFO L225 Difference]: With dead ends: 3045 [2020-11-11 15:12:40,558 INFO L226 Difference]: Without dead ends: 2775 [2020-11-11 15:12:40,559 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=384, Invalid=1176, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:12:40,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-11-11 15:12:40,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 1902. [2020-11-11 15:12:40,585 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 15:12:40,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5176 transitions. [2020-11-11 15:12:40,590 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5176 transitions. Word has length 91 [2020-11-11 15:12:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:40,590 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 5176 transitions. [2020-11-11 15:12:40,590 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 15:12:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5176 transitions. [2020-11-11 15:12:40,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:40,593 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:40,593 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 15:12:40,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-11-11 15:12:40,804 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:40,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:40,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1355142065, now seen corresponding path program 78 times [2020-11-11 15:12:40,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:40,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522231144] [2020-11-11 15:12:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:41,088 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 15:12:41,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522231144] [2020-11-11 15:12:41,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587942366] [2020-11-11 15:12:41,089 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 15:12:41,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:12:41,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:41,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:41,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:41,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:41,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:41,253 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 15:12:41,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:41,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:12:41,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125303880] [2020-11-11 15:12:41,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:41,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:41,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:41,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:41,254 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 15:12:42,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:42,027 INFO L93 Difference]: Finished difference Result 3045 states and 7640 transitions. [2020-11-11 15:12:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:12:42,028 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 15:12:42,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:42,031 INFO L225 Difference]: With dead ends: 3045 [2020-11-11 15:12:42,031 INFO L226 Difference]: Without dead ends: 2775 [2020-11-11 15:12:42,032 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:12:42,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-11-11 15:12:42,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 1952. [2020-11-11 15:12:42,056 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 15:12:42,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 5326 transitions. [2020-11-11 15:12:42,059 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 5326 transitions. Word has length 91 [2020-11-11 15:12:42,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:42,059 INFO L481 AbstractCegarLoop]: Abstraction has 1952 states and 5326 transitions. [2020-11-11 15:12:42,059 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 15:12:42,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 5326 transitions. [2020-11-11 15:12:42,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:42,061 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:42,062 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 15:12:42,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-11 15:12:42,277 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:42,277 INFO L82 PathProgramCache]: Analyzing trace with hash 787976191, now seen corresponding path program 79 times [2020-11-11 15:12:42,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:42,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135857087] [2020-11-11 15:12:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:42,551 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 15:12:42,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135857087] [2020-11-11 15:12:42,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449924586] [2020-11-11 15:12:42,551 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 15:12:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:42,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:42,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:42,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:42,691 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 15:12:42,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:42,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:12:42,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440672231] [2020-11-11 15:12:42,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:42,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:42,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:42,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:42,692 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 15:12:43,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:43,399 INFO L93 Difference]: Finished difference Result 3045 states and 7690 transitions. [2020-11-11 15:12:43,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:12:43,399 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 15:12:43,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:43,403 INFO L225 Difference]: With dead ends: 3045 [2020-11-11 15:12:43,403 INFO L226 Difference]: Without dead ends: 2775 [2020-11-11 15:12:43,404 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=425, Invalid=1297, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:12:43,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-11-11 15:12:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2002. [2020-11-11 15:12:43,428 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 15:12:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 5476 transitions. [2020-11-11 15:12:43,432 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 5476 transitions. Word has length 91 [2020-11-11 15:12:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:43,432 INFO L481 AbstractCegarLoop]: Abstraction has 2002 states and 5476 transitions. [2020-11-11 15:12:43,432 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 15:12:43,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 5476 transitions. [2020-11-11 15:12:43,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:43,433 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:43,434 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 15:12:43,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:43,634 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:43,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:43,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1616687343, now seen corresponding path program 80 times [2020-11-11 15:12:43,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:43,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316710085] [2020-11-11 15:12:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:43,906 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 15:12:43,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316710085] [2020-11-11 15:12:43,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338212750] [2020-11-11 15:12:43,907 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 15:12:43,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:43,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:43,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:43,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:44,015 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:44,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:44,082 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 15:12:44,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:44,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:12:44,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971031960] [2020-11-11 15:12:44,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:44,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:44,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:44,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:44,084 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 15:12:44,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:44,959 INFO L93 Difference]: Finished difference Result 3045 states and 7740 transitions. [2020-11-11 15:12:44,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:12:44,960 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 15:12:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:44,964 INFO L225 Difference]: With dead ends: 3045 [2020-11-11 15:12:44,964 INFO L226 Difference]: Without dead ends: 2775 [2020-11-11 15:12:44,964 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:12:44,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-11-11 15:12:44,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2052. [2020-11-11 15:12:44,990 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 15:12:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5626 transitions. [2020-11-11 15:12:44,993 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5626 transitions. Word has length 91 [2020-11-11 15:12:44,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:44,993 INFO L481 AbstractCegarLoop]: Abstraction has 2052 states and 5626 transitions. [2020-11-11 15:12:44,993 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 15:12:44,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5626 transitions. [2020-11-11 15:12:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:44,995 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:44,995 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 15:12:45,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:45,196 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:45,196 INFO L82 PathProgramCache]: Analyzing trace with hash -105851203, now seen corresponding path program 81 times [2020-11-11 15:12:45,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:45,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992975053] [2020-11-11 15:12:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:45,463 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 15:12:45,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992975053] [2020-11-11 15:12:45,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939590266] [2020-11-11 15:12:45,464 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 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 15:12:45,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 15:12:45,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:45,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:45,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:45,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:45,601 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 15:12:45,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:45,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:12:45,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139906805] [2020-11-11 15:12:45,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:45,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:45,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:45,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:45,603 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 15:12:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:46,359 INFO L93 Difference]: Finished difference Result 3045 states and 7790 transitions. [2020-11-11 15:12:46,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:12:46,360 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 15:12:46,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:46,364 INFO L225 Difference]: With dead ends: 3045 [2020-11-11 15:12:46,364 INFO L226 Difference]: Without dead ends: 2775 [2020-11-11 15:12:46,364 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=482, Invalid=1410, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:12:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-11-11 15:12:46,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2102. [2020-11-11 15:12:46,390 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 15:12:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 5776 transitions. [2020-11-11 15:12:46,393 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 5776 transitions. Word has length 91 [2020-11-11 15:12:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:46,393 INFO L481 AbstractCegarLoop]: Abstraction has 2102 states and 5776 transitions. [2020-11-11 15:12:46,394 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 15:12:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 5776 transitions. [2020-11-11 15:12:46,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:46,396 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:46,397 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 15:12:46,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:46,597 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:46,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1645386835, now seen corresponding path program 82 times [2020-11-11 15:12:46,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:46,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588813367] [2020-11-11 15:12:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:46,855 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 15:12:46,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588813367] [2020-11-11 15:12:46,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132189639] [2020-11-11 15:12:46,856 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 15:12:46,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:46,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:46,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:12:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:46,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:47,009 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:47,021 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 15:12:47,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:47,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:12:47,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823162080] [2020-11-11 15:12:47,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:47,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:47,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:47,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:47,023 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 15:12:47,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:47,997 INFO L93 Difference]: Finished difference Result 3045 states and 7840 transitions. [2020-11-11 15:12:47,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:12:47,997 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 15:12:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:48,001 INFO L225 Difference]: With dead ends: 3045 [2020-11-11 15:12:48,001 INFO L226 Difference]: Without dead ends: 2775 [2020-11-11 15:12:48,002 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=509, Invalid=1561, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:12:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-11-11 15:12:48,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2152. [2020-11-11 15:12:48,028 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 15:12:48,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 5926 transitions. [2020-11-11 15:12:48,032 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 5926 transitions. Word has length 91 [2020-11-11 15:12:48,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:48,032 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 5926 transitions. [2020-11-11 15:12:48,032 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 15:12:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 5926 transitions. [2020-11-11 15:12:48,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:48,034 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:48,034 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 15:12:48,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:48,235 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:48,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1293013755, now seen corresponding path program 83 times [2020-11-11 15:12:48,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:48,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032727285] [2020-11-11 15:12:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:48,476 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 15:12:48,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032727285] [2020-11-11 15:12:48,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103670723] [2020-11-11 15:12:48,477 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 15:12:48,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 15:12:48,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:48,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:48,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:48,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:48,637 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 15:12:48,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:48,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:12:48,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940653658] [2020-11-11 15:12:48,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:48,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:48,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:48,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:48,639 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 15:12:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:49,446 INFO L93 Difference]: Finished difference Result 3045 states and 7890 transitions. [2020-11-11 15:12:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:12:49,447 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 15:12:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:49,451 INFO L225 Difference]: With dead ends: 3045 [2020-11-11 15:12:49,451 INFO L226 Difference]: Without dead ends: 2775 [2020-11-11 15:12:49,452 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=555, Invalid=1515, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:12:49,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2020-11-11 15:12:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2202. [2020-11-11 15:12:49,479 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 15:12:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 6076 transitions. [2020-11-11 15:12:49,483 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 6076 transitions. Word has length 91 [2020-11-11 15:12:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:49,483 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 6076 transitions. [2020-11-11 15:12:49,483 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 15:12:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 6076 transitions. [2020-11-11 15:12:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:49,486 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:49,486 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 15:12:49,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:49,687 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:49,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1170420757, now seen corresponding path program 84 times [2020-11-11 15:12:49,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:49,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418686065] [2020-11-11 15:12:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:49,940 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 15:12:49,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418686065] [2020-11-11 15:12:49,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648646149] [2020-11-11 15:12:49,940 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 15:12:50,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 15:12:50,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:50,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:50,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:50,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:50,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:50,108 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 15:12:50,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:50,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-11-11 15:12:50,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620517783] [2020-11-11 15:12:50,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:50,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:50,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:50,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:50,110 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 15:12:51,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:51,164 INFO L93 Difference]: Finished difference Result 3090 states and 8060 transitions. [2020-11-11 15:12:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:12:51,165 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 15:12:51,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:51,169 INFO L225 Difference]: With dead ends: 3090 [2020-11-11 15:12:51,169 INFO L226 Difference]: Without dead ends: 2820 [2020-11-11 15:12:51,169 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=584, Invalid=1672, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:12:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2020-11-11 15:12:51,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2252. [2020-11-11 15:12:51,197 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 15:12:51,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 6241 transitions. [2020-11-11 15:12:51,200 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 6241 transitions. Word has length 91 [2020-11-11 15:12:51,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:51,201 INFO L481 AbstractCegarLoop]: Abstraction has 2252 states and 6241 transitions. [2020-11-11 15:12:51,201 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 15:12:51,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 6241 transitions. [2020-11-11 15:12:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:51,203 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:51,203 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 15:12:51,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:51,404 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:51,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:51,404 INFO L82 PathProgramCache]: Analyzing trace with hash -541629255, now seen corresponding path program 85 times [2020-11-11 15:12:51,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:51,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578567953] [2020-11-11 15:12:51,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:51,638 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 15:12:51,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578567953] [2020-11-11 15:12:51,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525001550] [2020-11-11 15:12:51,638 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 15:12:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:51,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:51,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:51,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:51,806 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 15:12:51,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:51,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:12:51,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226209656] [2020-11-11 15:12:51,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:51,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:51,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:51,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:51,808 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 15:12:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:52,714 INFO L93 Difference]: Finished difference Result 4152 states and 11144 transitions. [2020-11-11 15:12:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:12:52,715 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 15:12:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:52,720 INFO L225 Difference]: With dead ends: 4152 [2020-11-11 15:12:52,720 INFO L226 Difference]: Without dead ends: 3882 [2020-11-11 15:12:52,721 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=645, Invalid=1611, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:12:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2020-11-11 15:12:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 2377. [2020-11-11 15:12:52,755 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 15:12:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 6632 transitions. [2020-11-11 15:12:52,759 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 6632 transitions. Word has length 91 [2020-11-11 15:12:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:52,760 INFO L481 AbstractCegarLoop]: Abstraction has 2377 states and 6632 transitions. [2020-11-11 15:12:52,760 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 15:12:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 6632 transitions. [2020-11-11 15:12:52,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-11 15:12:52,761 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:52,762 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 15:12:52,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:52,962 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:52,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1169578699, now seen corresponding path program 86 times [2020-11-11 15:12:52,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:52,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746323373] [2020-11-11 15:12:52,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:53,205 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 15:12:53,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746323373] [2020-11-11 15:12:53,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692380589] [2020-11-11 15:12:53,206 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 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 15:12:53,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:12:53,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:53,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 15:12:53,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:53,311 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:53,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:53,337 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 15:12:53,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:53,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 15:12:53,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941575970] [2020-11-11 15:12:53,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:53,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:53,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:53,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:53,338 INFO L87 Difference]: Start difference. First operand 2377 states and 6632 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 15:12:54,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:54,454 INFO L93 Difference]: Finished difference Result 3166 states and 8450 transitions. [2020-11-11 15:12:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:12:54,455 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 15:12:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:54,458 INFO L225 Difference]: With dead ends: 3166 [2020-11-11 15:12:54,458 INFO L226 Difference]: Without dead ends: 2755 [2020-11-11 15:12:54,459 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:12:54,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2020-11-11 15:12:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1691. [2020-11-11 15:12:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 2.7029585798816567) internal successors, (4568), 1690 states have internal predecessors, (4568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 4568 transitions. [2020-11-11 15:12:54,482 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 4568 transitions. Word has length 91 [2020-11-11 15:12:54,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:54,483 INFO L481 AbstractCegarLoop]: Abstraction has 1691 states and 4568 transitions. [2020-11-11 15:12:54,483 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 15:12:54,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 4568 transitions. [2020-11-11 15:12:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:54,484 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:54,484 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 15:12:54,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-11-11 15:12:54,685 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:54,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:54,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1476649203, now seen corresponding path program 87 times [2020-11-11 15:12:54,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:54,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666222289] [2020-11-11 15:12:54,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:55,043 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 15:12:55,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666222289] [2020-11-11 15:12:55,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726184325] [2020-11-11 15:12:55,043 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 15:12:55,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:12:55,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:55,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:12:55,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:55,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:55,185 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:55,199 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 15:12:55,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:55,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:12:55,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547896568] [2020-11-11 15:12:55,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:12:55,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:55,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:12:55,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:12:55,200 INFO L87 Difference]: Start difference. First operand 1691 states and 4568 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 15:12:55,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:55,877 INFO L93 Difference]: Finished difference Result 2809 states and 7252 transitions. [2020-11-11 15:12:55,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:12:55,877 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 15:12:55,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:55,881 INFO L225 Difference]: With dead ends: 2809 [2020-11-11 15:12:55,881 INFO L226 Difference]: Without dead ends: 2475 [2020-11-11 15:12:55,882 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:12:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2020-11-11 15:12:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 1776. [2020-11-11 15:12:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.669295774647887) internal successors, (4738), 1775 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:12:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 4738 transitions. [2020-11-11 15:12:55,907 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 4738 transitions. Word has length 96 [2020-11-11 15:12:55,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:55,908 INFO L481 AbstractCegarLoop]: Abstraction has 1776 states and 4738 transitions. [2020-11-11 15:12:55,908 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 15:12:55,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 4738 transitions. [2020-11-11 15:12:55,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:55,909 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:55,909 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 15:12:56,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:56,110 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:56,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:56,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1036481211, now seen corresponding path program 88 times [2020-11-11 15:12:56,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:56,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678481674] [2020-11-11 15:12:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:56,434 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 15:12:56,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678481674] [2020-11-11 15:12:56,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296007361] [2020-11-11 15:12:56,435 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 15:12:56,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:12:56,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:56,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:12:56,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:56,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:56,544 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 15:12:56,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:56,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:12:56,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908117229] [2020-11-11 15:12:56,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:56,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:56,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:56,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:56,546 INFO L87 Difference]: Start difference. First operand 1776 states and 4738 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 15:12:57,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:57,055 INFO L93 Difference]: Finished difference Result 3260 states and 7920 transitions. [2020-11-11 15:12:57,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 15:12:57,055 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 15:12:57,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:57,060 INFO L225 Difference]: With dead ends: 3260 [2020-11-11 15:12:57,060 INFO L226 Difference]: Without dead ends: 2990 [2020-11-11 15:12:57,060 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 15:12:57,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2020-11-11 15:12:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 1877. [2020-11-11 15:12:57,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.6791044776119404) internal successors, (5026), 1876 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 15:12:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5026 transitions. [2020-11-11 15:12:57,087 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5026 transitions. Word has length 96 [2020-11-11 15:12:57,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:57,087 INFO L481 AbstractCegarLoop]: Abstraction has 1877 states and 5026 transitions. [2020-11-11 15:12:57,087 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 15:12:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5026 transitions. [2020-11-11 15:12:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:57,089 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:57,089 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 15:12:57,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-11-11 15:12:57,293 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:57,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:57,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1672499115, now seen corresponding path program 89 times [2020-11-11 15:12:57,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:57,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896395479] [2020-11-11 15:12:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:57,645 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 15:12:57,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896395479] [2020-11-11 15:12:57,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342954870] [2020-11-11 15:12:57,645 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 15:12:57,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:12:57,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:57,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:57,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:57,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:12:57,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:57,778 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 15:12:57,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:57,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:12:57,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302841625] [2020-11-11 15:12:57,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:12:57,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:57,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:12:57,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:12:57,780 INFO L87 Difference]: Start difference. First operand 1877 states and 5026 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 15:12:58,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:58,494 INFO L93 Difference]: Finished difference Result 3195 states and 7840 transitions. [2020-11-11 15:12:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:12:58,494 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 15:12:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:58,498 INFO L225 Difference]: With dead ends: 3195 [2020-11-11 15:12:58,498 INFO L226 Difference]: Without dead ends: 2925 [2020-11-11 15:12:58,498 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:12:58,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2020-11-11 15:12:58,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 1927. [2020-11-11 15:12:58,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 2.687435098650052) internal successors, (5176), 1926 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 15:12:58,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 5176 transitions. [2020-11-11 15:12:58,525 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 5176 transitions. Word has length 96 [2020-11-11 15:12:58,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:58,525 INFO L481 AbstractCegarLoop]: Abstraction has 1927 states and 5176 transitions. [2020-11-11 15:12:58,525 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 15:12:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 5176 transitions. [2020-11-11 15:12:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:58,526 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:58,527 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 15:12:58,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:12:58,727 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:12:58,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:12:58,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1783027961, now seen corresponding path program 90 times [2020-11-11 15:12:58,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:12:58,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197230754] [2020-11-11 15:12:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:12:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:12:59,030 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 15:12:59,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197230754] [2020-11-11 15:12:59,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821691098] [2020-11-11 15:12:59,030 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 15:12:59,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:12:59,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:12:59,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:12:59,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:12:59,134 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:12:59,146 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 15:12:59,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:12:59,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:12:59,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559668206] [2020-11-11 15:12:59,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:12:59,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:12:59,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:12:59,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:12:59,148 INFO L87 Difference]: Start difference. First operand 1927 states and 5176 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 15:12:59,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:12:59,796 INFO L93 Difference]: Finished difference Result 3220 states and 7940 transitions. [2020-11-11 15:12:59,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 15:12:59,796 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 15:12:59,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:12:59,800 INFO L225 Difference]: With dead ends: 3220 [2020-11-11 15:12:59,800 INFO L226 Difference]: Without dead ends: 2950 [2020-11-11 15:12:59,800 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 15:12:59,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2020-11-11 15:12:59,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 1977. [2020-11-11 15:12:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1976 states have (on average 2.695344129554656) internal successors, (5326), 1976 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 15:12:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 5326 transitions. [2020-11-11 15:12:59,828 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 5326 transitions. Word has length 96 [2020-11-11 15:12:59,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:12:59,828 INFO L481 AbstractCegarLoop]: Abstraction has 1977 states and 5326 transitions. [2020-11-11 15:12:59,828 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 15:12:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 5326 transitions. [2020-11-11 15:12:59,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:12:59,830 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:12:59,830 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 15:13:00,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-11-11 15:13:00,038 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:00,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:00,039 INFO L82 PathProgramCache]: Analyzing trace with hash -448650775, now seen corresponding path program 91 times [2020-11-11 15:13:00,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:00,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120359333] [2020-11-11 15:13:00,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:00,359 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 15:13:00,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120359333] [2020-11-11 15:13:00,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222475620] [2020-11-11 15:13:00,360 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 15:13:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:00,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:00,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:00,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:00,496 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 15:13:00,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:00,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:13:00,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254959237] [2020-11-11 15:13:00,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:00,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:00,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:00,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:00,498 INFO L87 Difference]: Start difference. First operand 1977 states and 5326 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 15:13:01,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:01,327 INFO L93 Difference]: Finished difference Result 3220 states and 7990 transitions. [2020-11-11 15:13:01,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:01,328 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 15:13:01,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:01,331 INFO L225 Difference]: With dead ends: 3220 [2020-11-11 15:13:01,331 INFO L226 Difference]: Without dead ends: 2950 [2020-11-11 15:13:01,332 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:13:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2020-11-11 15:13:01,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2027. [2020-11-11 15:13:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 2.702862783810464) internal successors, (5476), 2026 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 15:13:01,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 5476 transitions. [2020-11-11 15:13:01,359 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 5476 transitions. Word has length 96 [2020-11-11 15:13:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:01,359 INFO L481 AbstractCegarLoop]: Abstraction has 2027 states and 5476 transitions. [2020-11-11 15:13:01,359 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 15:13:01,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 5476 transitions. [2020-11-11 15:13:01,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:13:01,361 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:01,361 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 15:13:01,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-11-11 15:13:01,575 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:01,575 INFO L82 PathProgramCache]: Analyzing trace with hash -886614857, now seen corresponding path program 92 times [2020-11-11 15:13:01,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:01,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437239022] [2020-11-11 15:13:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:01,846 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 15:13:01,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437239022] [2020-11-11 15:13:01,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715928122] [2020-11-11 15:13:01,846 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 15:13:01,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:01,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:01,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:01,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:01,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:01,952 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 15:13:01,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:01,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:13:01,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026924438] [2020-11-11 15:13:01,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:01,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:01,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:01,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:01,953 INFO L87 Difference]: Start difference. First operand 2027 states and 5476 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 15:13:02,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:02,631 INFO L93 Difference]: Finished difference Result 3220 states and 8040 transitions. [2020-11-11 15:13:02,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:13:02,631 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 15:13:02,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:02,635 INFO L225 Difference]: With dead ends: 3220 [2020-11-11 15:13:02,636 INFO L226 Difference]: Without dead ends: 2950 [2020-11-11 15:13:02,636 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:13:02,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2020-11-11 15:13:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2077. [2020-11-11 15:13:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 2076 states have (on average 2.710019267822736) internal successors, (5626), 2076 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 15:13:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 5626 transitions. [2020-11-11 15:13:02,664 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 5626 transitions. Word has length 96 [2020-11-11 15:13:02,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:02,665 INFO L481 AbstractCegarLoop]: Abstraction has 2077 states and 5626 transitions. [2020-11-11 15:13:02,665 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 15:13:02,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 5626 transitions. [2020-11-11 15:13:02,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:13:02,666 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:02,666 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 15:13:02,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-11-11 15:13:02,867 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:02,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1863059879, now seen corresponding path program 93 times [2020-11-11 15:13:02,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:02,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103650446] [2020-11-11 15:13:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:02,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:03,167 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 15:13:03,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103650446] [2020-11-11 15:13:03,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782203980] [2020-11-11 15:13:03,168 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 15:13:03,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:13:03,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:03,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:03,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:03,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:03,324 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 15:13:03,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:03,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:13:03,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739303603] [2020-11-11 15:13:03,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:03,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:03,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:03,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:03,325 INFO L87 Difference]: Start difference. First operand 2077 states and 5626 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 15:13:04,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:04,240 INFO L93 Difference]: Finished difference Result 3220 states and 8090 transitions. [2020-11-11 15:13:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:13:04,241 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 15:13:04,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:04,259 INFO L225 Difference]: With dead ends: 3220 [2020-11-11 15:13:04,259 INFO L226 Difference]: Without dead ends: 2950 [2020-11-11 15:13:04,259 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:13:04,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2020-11-11 15:13:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2127. [2020-11-11 15:13:04,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2126 states have (on average 2.7168391345249296) internal successors, (5776), 2126 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 15:13:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 5776 transitions. [2020-11-11 15:13:04,287 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 5776 transitions. Word has length 96 [2020-11-11 15:13:04,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:04,287 INFO L481 AbstractCegarLoop]: Abstraction has 2127 states and 5776 transitions. [2020-11-11 15:13:04,287 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 15:13:04,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 5776 transitions. [2020-11-11 15:13:04,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:13:04,289 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:04,290 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 15:13:04,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:04,490 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:04,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:04,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1295894005, now seen corresponding path program 94 times [2020-11-11 15:13:04,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:04,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4003992] [2020-11-11 15:13:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:04,768 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 15:13:04,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4003992] [2020-11-11 15:13:04,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972941618] [2020-11-11 15:13:04,768 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 15:13:04,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:04,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:04,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:04,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:04,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:04,879 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 15:13:04,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:04,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:13:04,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398946971] [2020-11-11 15:13:04,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:04,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:04,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:04,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:04,881 INFO L87 Difference]: Start difference. First operand 2127 states and 5776 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 15:13:05,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:05,641 INFO L93 Difference]: Finished difference Result 3220 states and 8140 transitions. [2020-11-11 15:13:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:13:05,642 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 15:13:05,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:05,649 INFO L225 Difference]: With dead ends: 3220 [2020-11-11 15:13:05,650 INFO L226 Difference]: Without dead ends: 2950 [2020-11-11 15:13:05,650 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:13:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2020-11-11 15:13:05,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2177. [2020-11-11 15:13:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 2.723345588235294) internal successors, (5926), 2176 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 15:13:05,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 5926 transitions. [2020-11-11 15:13:05,694 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 5926 transitions. Word has length 96 [2020-11-11 15:13:05,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:05,694 INFO L481 AbstractCegarLoop]: Abstraction has 2177 states and 5926 transitions. [2020-11-11 15:13:05,695 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 15:13:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 5926 transitions. [2020-11-11 15:13:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:13:05,697 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:05,697 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 15:13:05,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-11-11 15:13:05,907 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:05,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:05,907 INFO L82 PathProgramCache]: Analyzing trace with hash 2124605157, now seen corresponding path program 95 times [2020-11-11 15:13:05,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:05,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473241220] [2020-11-11 15:13:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:06,205 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 15:13:06,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473241220] [2020-11-11 15:13:06,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718577123] [2020-11-11 15:13:06,205 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 15:13:06,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:13:06,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:06,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:06,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:06,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:06,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:06,362 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 15:13:06,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:06,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:13:06,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540477013] [2020-11-11 15:13:06,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:06,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:06,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:06,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:06,364 INFO L87 Difference]: Start difference. First operand 2177 states and 5926 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 15:13:07,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:07,370 INFO L93 Difference]: Finished difference Result 3220 states and 8190 transitions. [2020-11-11 15:13:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:13:07,371 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 15:13:07,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:07,375 INFO L225 Difference]: With dead ends: 3220 [2020-11-11 15:13:07,375 INFO L226 Difference]: Without dead ends: 2950 [2020-11-11 15:13:07,375 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:13:07,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2020-11-11 15:13:07,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2227. [2020-11-11 15:13:07,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 2.729559748427673) internal successors, (6076), 2226 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 15:13:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 6076 transitions. [2020-11-11 15:13:07,420 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 6076 transitions. Word has length 96 [2020-11-11 15:13:07,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:07,421 INFO L481 AbstractCegarLoop]: Abstraction has 2227 states and 6076 transitions. [2020-11-11 15:13:07,421 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 15:13:07,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 6076 transitions. [2020-11-11 15:13:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:13:07,422 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:07,423 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 15:13:07,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:07,631 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:07,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:07,631 INFO L82 PathProgramCache]: Analyzing trace with hash 402066611, now seen corresponding path program 96 times [2020-11-11 15:13:07,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:07,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568205435] [2020-11-11 15:13:07,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:07,924 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 15:13:07,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568205435] [2020-11-11 15:13:07,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331532617] [2020-11-11 15:13:07,924 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 15:13:08,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:13:08,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:08,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:08,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:08,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:08,062 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 15:13:08,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:08,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:13:08,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748227213] [2020-11-11 15:13:08,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:08,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:08,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:08,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:08,064 INFO L87 Difference]: Start difference. First operand 2227 states and 6076 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 15:13:08,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:08,890 INFO L93 Difference]: Finished difference Result 3220 states and 8240 transitions. [2020-11-11 15:13:08,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:13:08,891 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 15:13:08,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:08,895 INFO L225 Difference]: With dead ends: 3220 [2020-11-11 15:13:08,895 INFO L226 Difference]: Without dead ends: 2950 [2020-11-11 15:13:08,895 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:13:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2020-11-11 15:13:08,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2277. [2020-11-11 15:13:08,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2276 states have (on average 2.735500878734622) internal successors, (6226), 2276 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 15:13:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 6226 transitions. [2020-11-11 15:13:08,925 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 6226 transitions. Word has length 96 [2020-11-11 15:13:08,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:08,925 INFO L481 AbstractCegarLoop]: Abstraction has 2277 states and 6226 transitions. [2020-11-11 15:13:08,925 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 15:13:08,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 6226 transitions. [2020-11-11 15:13:08,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:13:08,927 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:08,927 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 15:13:09,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-11-11 15:13:09,128 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:09,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:09,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1137469021, now seen corresponding path program 97 times [2020-11-11 15:13:09,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:09,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615825356] [2020-11-11 15:13:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:09,414 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 15:13:09,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615825356] [2020-11-11 15:13:09,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016942536] [2020-11-11 15:13:09,415 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 15:13:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:09,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:09,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:09,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:09,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:09,557 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 15:13:09,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:09,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:13:09,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625178498] [2020-11-11 15:13:09,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:09,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:09,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:09,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:09,558 INFO L87 Difference]: Start difference. First operand 2277 states and 6226 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 15:13:10,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:10,699 INFO L93 Difference]: Finished difference Result 3220 states and 8290 transitions. [2020-11-11 15:13:10,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:13:10,699 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 15:13:10,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:10,702 INFO L225 Difference]: With dead ends: 3220 [2020-11-11 15:13:10,702 INFO L226 Difference]: Without dead ends: 2950 [2020-11-11 15:13:10,702 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:13:10,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2020-11-11 15:13:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2327. [2020-11-11 15:13:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 2326 states have (on average 2.7411865864144453) internal successors, (6376), 2326 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 15:13:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 6376 transitions. [2020-11-11 15:13:10,733 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 6376 transitions. Word has length 96 [2020-11-11 15:13:10,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:10,733 INFO L481 AbstractCegarLoop]: Abstraction has 2327 states and 6376 transitions. [2020-11-11 15:13:10,733 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 15:13:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 6376 transitions. [2020-11-11 15:13:10,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:13:10,735 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:10,735 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 15:13:10,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:10,936 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:10,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:10,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1800931569, now seen corresponding path program 98 times [2020-11-11 15:13:10,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:10,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151870692] [2020-11-11 15:13:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:11,199 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 15:13:11,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151870692] [2020-11-11 15:13:11,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443361417] [2020-11-11 15:13:11,199 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 15:13:11,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:11,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:11,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:11,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:11,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:11,312 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 15:13:11,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:11,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:13:11,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774167808] [2020-11-11 15:13:11,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:11,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:11,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:11,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:11,313 INFO L87 Difference]: Start difference. First operand 2327 states and 6376 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 15:13:12,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:12,227 INFO L93 Difference]: Finished difference Result 3220 states and 8340 transitions. [2020-11-11 15:13:12,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:13:12,228 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 15:13:12,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:12,231 INFO L225 Difference]: With dead ends: 3220 [2020-11-11 15:13:12,232 INFO L226 Difference]: Without dead ends: 2950 [2020-11-11 15:13:12,232 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:13:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2020-11-11 15:13:12,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2377. [2020-11-11 15:13:12,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 2.7466329966329965) internal successors, (6526), 2376 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 15:13:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 6526 transitions. [2020-11-11 15:13:12,265 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 6526 transitions. Word has length 96 [2020-11-11 15:13:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:12,265 INFO L481 AbstractCegarLoop]: Abstraction has 2377 states and 6526 transitions. [2020-11-11 15:13:12,265 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 15:13:12,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 6526 transitions. [2020-11-11 15:13:12,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:13:12,267 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:12,267 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 15:13:12,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:12,475 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:12,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:12,475 INFO L82 PathProgramCache]: Analyzing trace with hash -662502943, now seen corresponding path program 99 times [2020-11-11 15:13:12,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:12,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022148377] [2020-11-11 15:13:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:12,745 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 15:13:12,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022148377] [2020-11-11 15:13:12,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828993410] [2020-11-11 15:13:12,745 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 15:13:12,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:13:12,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:12,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:12,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:12,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:12,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:12,890 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 15:13:12,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:12,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:13:12,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955988737] [2020-11-11 15:13:12,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:12,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:12,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:12,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:12,892 INFO L87 Difference]: Start difference. First operand 2377 states and 6526 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 15:13:14,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:14,155 INFO L93 Difference]: Finished difference Result 3265 states and 8510 transitions. [2020-11-11 15:13:14,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:13:14,156 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 15:13:14,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:14,160 INFO L225 Difference]: With dead ends: 3265 [2020-11-11 15:13:14,160 INFO L226 Difference]: Without dead ends: 2995 [2020-11-11 15:13:14,161 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:13:14,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2020-11-11 15:13:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2427. [2020-11-11 15:13:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 2.758037922506183) internal successors, (6691), 2426 states have internal predecessors, (6691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 6691 transitions. [2020-11-11 15:13:14,197 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 6691 transitions. Word has length 96 [2020-11-11 15:13:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:14,197 INFO L481 AbstractCegarLoop]: Abstraction has 2427 states and 6691 transitions. [2020-11-11 15:13:14,197 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 15:13:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 6691 transitions. [2020-11-11 15:13:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:13:14,199 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:14,199 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 15:13:14,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-11-11 15:13:14,400 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:14,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:14,401 INFO L82 PathProgramCache]: Analyzing trace with hash -33711441, now seen corresponding path program 100 times [2020-11-11 15:13:14,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:14,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571352006] [2020-11-11 15:13:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:14,659 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 15:13:14,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571352006] [2020-11-11 15:13:14,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345040769] [2020-11-11 15:13:14,660 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 15:13:14,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:14,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:14,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:14,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:14,769 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 15:13:14,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:14,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 15:13:14,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545488385] [2020-11-11 15:13:14,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 15:13:14,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:14,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 15:13:14,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-11-11 15:13:14,770 INFO L87 Difference]: Start difference. First operand 2427 states and 6691 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 15:13:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:15,763 INFO L93 Difference]: Finished difference Result 4352 states and 11644 transitions. [2020-11-11 15:13:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:13:15,763 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 15:13:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:15,769 INFO L225 Difference]: With dead ends: 4352 [2020-11-11 15:13:15,770 INFO L226 Difference]: Without dead ends: 4082 [2020-11-11 15:13:15,770 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:13:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2020-11-11 15:13:15,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 2552. [2020-11-11 15:13:15,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.776166209329675) internal successors, (7082), 2551 states have internal predecessors, (7082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:15,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 7082 transitions. [2020-11-11 15:13:15,809 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 7082 transitions. Word has length 96 [2020-11-11 15:13:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:15,809 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states and 7082 transitions. [2020-11-11 15:13:15,809 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 15:13:15,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 7082 transitions. [2020-11-11 15:13:15,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-11-11 15:13:15,811 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:15,811 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 15:13:16,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-11-11 15:13:16,012 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:16,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1677496513, now seen corresponding path program 101 times [2020-11-11 15:13:16,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:16,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046274200] [2020-11-11 15:13:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:16,285 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 15:13:16,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046274200] [2020-11-11 15:13:16,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587553203] [2020-11-11 15:13:16,286 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 15:13:16,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:13:16,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:16,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 15:13:16,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:16,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:16,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:16,420 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 15:13:16,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:16,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 15:13:16,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104232538] [2020-11-11 15:13:16,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:16,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:16,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:16,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:16,422 INFO L87 Difference]: Start difference. First operand 2552 states and 7082 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 15:13:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:17,745 INFO L93 Difference]: Finished difference Result 3391 states and 9000 transitions. [2020-11-11 15:13:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:13:17,746 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 15:13:17,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:17,749 INFO L225 Difference]: With dead ends: 3391 [2020-11-11 15:13:17,749 INFO L226 Difference]: Without dead ends: 2980 [2020-11-11 15:13:17,749 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:13:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2020-11-11 15:13:17,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 1902. [2020-11-11 15:13:17,771 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 15:13:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5126 transitions. [2020-11-11 15:13:17,773 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5126 transitions. Word has length 96 [2020-11-11 15:13:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:17,774 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 5126 transitions. [2020-11-11 15:13:17,774 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 15:13:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5126 transitions. [2020-11-11 15:13:17,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:17,775 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:17,775 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 15:13:17,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:17,976 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:17,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash 756357588, now seen corresponding path program 102 times [2020-11-11 15:13:17,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:17,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233442972] [2020-11-11 15:13:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:18,324 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 15:13:18,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233442972] [2020-11-11 15:13:18,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287284661] [2020-11-11 15:13:18,325 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 15:13:18,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:13:18,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:18,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:18,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:18,454 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:18,477 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 15:13:18,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:18,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-11 15:13:18,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364599708] [2020-11-11 15:13:18,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:18,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:18,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:18,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:18,478 INFO L87 Difference]: Start difference. First operand 1902 states and 5126 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:19,155 INFO L93 Difference]: Finished difference Result 2995 states and 7490 transitions. [2020-11-11 15:13:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:13:19,156 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have 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 15:13:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:19,160 INFO L225 Difference]: With dead ends: 2995 [2020-11-11 15:13:19,160 INFO L226 Difference]: Without dead ends: 2725 [2020-11-11 15:13:19,160 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=390, Invalid=1170, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:13:19,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2020-11-11 15:13:19,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1952. [2020-11-11 15:13:19,195 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 15:13:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 5276 transitions. [2020-11-11 15:13:19,200 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 5276 transitions. Word has length 101 [2020-11-11 15:13:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:19,200 INFO L481 AbstractCegarLoop]: Abstraction has 1952 states and 5276 transitions. [2020-11-11 15:13:19,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 5276 transitions. [2020-11-11 15:13:19,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:19,203 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:19,203 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 15:13:19,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-11-11 15:13:19,417 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:19,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:19,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1392375492, now seen corresponding path program 103 times [2020-11-11 15:13:19,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:19,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942932340] [2020-11-11 15:13:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:19,787 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 15:13:19,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942932340] [2020-11-11 15:13:19,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659585608] [2020-11-11 15:13:19,788 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 15:13:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:19,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:19,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:19,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:19,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:19,928 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 15:13:19,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:19,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:13:19,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559881706] [2020-11-11 15:13:19,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:19,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:19,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:19,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:19,929 INFO L87 Difference]: Start difference. First operand 1952 states and 5276 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 15:13:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:20,711 INFO L93 Difference]: Finished difference Result 3340 states and 8230 transitions. [2020-11-11 15:13:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:20,711 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 15:13:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:20,715 INFO L225 Difference]: With dead ends: 3340 [2020-11-11 15:13:20,715 INFO L226 Difference]: Without dead ends: 3070 [2020-11-11 15:13:20,715 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 15:13:20,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2020-11-11 15:13:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2002. [2020-11-11 15:13:20,741 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 15:13:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 5426 transitions. [2020-11-11 15:13:20,745 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 5426 transitions. Word has length 101 [2020-11-11 15:13:20,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:20,745 INFO L481 AbstractCegarLoop]: Abstraction has 2002 states and 5426 transitions. [2020-11-11 15:13:20,745 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 15:13:20,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 5426 transitions. [2020-11-11 15:13:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:20,746 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:20,746 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 15:13:20,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-11-11 15:13:20,947 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:20,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1502904338, now seen corresponding path program 104 times [2020-11-11 15:13:20,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:20,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245928659] [2020-11-11 15:13:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:21,279 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 15:13:21,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245928659] [2020-11-11 15:13:21,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113486020] [2020-11-11 15:13:21,279 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 15:13:21,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:21,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:21,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:21,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:21,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:21,400 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 15:13:21,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:21,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-11 15:13:21,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57886011] [2020-11-11 15:13:21,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:21,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:21,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:21,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:21,401 INFO L87 Difference]: Start difference. First operand 2002 states and 5426 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:22,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:22,128 INFO L93 Difference]: Finished difference Result 3345 states and 8290 transitions. [2020-11-11 15:13:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:13:22,129 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have 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 15:13:22,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:22,134 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:22,134 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:22,134 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=441, Invalid=1365, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 15:13:22,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:22,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2052. [2020-11-11 15:13:22,160 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 15:13:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2052 states to 2052 states and 5576 transitions. [2020-11-11 15:13:22,163 INFO L78 Accepts]: Start accepts. Automaton has 2052 states and 5576 transitions. Word has length 101 [2020-11-11 15:13:22,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:22,163 INFO L481 AbstractCegarLoop]: Abstraction has 2052 states and 5576 transitions. [2020-11-11 15:13:22,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:22,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2052 states and 5576 transitions. [2020-11-11 15:13:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:22,165 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:22,165 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 15:13:22,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-11-11 15:13:22,366 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:22,366 INFO L82 PathProgramCache]: Analyzing trace with hash -728774398, now seen corresponding path program 105 times [2020-11-11 15:13:22,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:22,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440296266] [2020-11-11 15:13:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:22,718 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 15:13:22,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440296266] [2020-11-11 15:13:22,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436021306] [2020-11-11 15:13:22,719 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 15:13:22,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:13:22,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:22,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:22,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:22,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:22,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:22,882 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 15:13:22,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:22,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:13:22,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889886120] [2020-11-11 15:13:22,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:22,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:22,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:22,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:22,883 INFO L87 Difference]: Start difference. First operand 2052 states and 5576 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 15:13:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:23,793 INFO L93 Difference]: Finished difference Result 3345 states and 8340 transitions. [2020-11-11 15:13:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:13:23,794 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 15:13:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:23,798 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:23,798 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:23,799 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=463, Invalid=1517, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 15:13:23,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:23,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2102. [2020-11-11 15:13:23,824 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 15:13:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 5726 transitions. [2020-11-11 15:13:23,828 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 5726 transitions. Word has length 101 [2020-11-11 15:13:23,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:23,828 INFO L481 AbstractCegarLoop]: Abstraction has 2102 states and 5726 transitions. [2020-11-11 15:13:23,828 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 15:13:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 5726 transitions. [2020-11-11 15:13:23,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:23,830 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:23,830 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 15:13:24,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:24,030 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:24,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:24,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1166738480, now seen corresponding path program 106 times [2020-11-11 15:13:24,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:24,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794346733] [2020-11-11 15:13:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:24,341 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 15:13:24,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794346733] [2020-11-11 15:13:24,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329341456] [2020-11-11 15:13:24,342 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 15:13:24,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:24,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:24,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:13:24,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:24,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:24,450 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 15:13:24,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:24,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-11 15:13:24,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801250605] [2020-11-11 15:13:24,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:24,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:24,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:24,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:24,451 INFO L87 Difference]: Start difference. First operand 2102 states and 5726 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:25,254 INFO L93 Difference]: Finished difference Result 3345 states and 8390 transitions. [2020-11-11 15:13:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:13:25,254 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have 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 15:13:25,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:25,258 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:25,258 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:25,259 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=481, Invalid=1499, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 15:13:25,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2152. [2020-11-11 15:13:25,286 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 15:13:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 5876 transitions. [2020-11-11 15:13:25,290 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 5876 transitions. Word has length 101 [2020-11-11 15:13:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:25,290 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 5876 transitions. [2020-11-11 15:13:25,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 5876 transitions. [2020-11-11 15:13:25,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:25,291 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:25,292 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 15:13:25,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-11-11 15:13:25,492 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:25,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:25,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1582936256, now seen corresponding path program 107 times [2020-11-11 15:13:25,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:25,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406760786] [2020-11-11 15:13:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:25,822 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 15:13:25,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406760786] [2020-11-11 15:13:25,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73831234] [2020-11-11 15:13:25,822 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 15:13:25,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:13:25,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:25,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:25,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:25,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:25,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:25,961 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 15:13:25,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:25,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:13:25,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886237596] [2020-11-11 15:13:25,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:25,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:25,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:25,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:25,962 INFO L87 Difference]: Start difference. First operand 2152 states and 5876 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 15:13:26,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:26,976 INFO L93 Difference]: Finished difference Result 3345 states and 8440 transitions. [2020-11-11 15:13:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:13:26,977 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 15:13:26,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:26,981 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:26,981 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:26,981 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=505, Invalid=1657, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:13:26,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:27,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2202. [2020-11-11 15:13:27,005 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 15:13:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 6026 transitions. [2020-11-11 15:13:27,008 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 6026 transitions. Word has length 101 [2020-11-11 15:13:27,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:27,008 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 6026 transitions. [2020-11-11 15:13:27,008 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 15:13:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 6026 transitions. [2020-11-11 15:13:27,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:27,010 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:27,010 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 15:13:27,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-11-11 15:13:27,211 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:27,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:27,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1015770382, now seen corresponding path program 108 times [2020-11-11 15:13:27,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:27,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791726506] [2020-11-11 15:13:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:27,513 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 15:13:27,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791726506] [2020-11-11 15:13:27,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993790259] [2020-11-11 15:13:27,513 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 15:13:27,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:13:27,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:27,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:27,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:27,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:27,633 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 15:13:27,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:27,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-11 15:13:27,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862492817] [2020-11-11 15:13:27,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:27,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:27,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:27,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:27,634 INFO L87 Difference]: Start difference. First operand 2202 states and 6026 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:28,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:28,518 INFO L93 Difference]: Finished difference Result 3345 states and 8490 transitions. [2020-11-11 15:13:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:13:28,519 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have 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 15:13:28,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:28,523 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:28,523 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:28,523 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=1625, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:13:28,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2252. [2020-11-11 15:13:28,551 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 15:13:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 6176 transitions. [2020-11-11 15:13:28,555 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 6176 transitions. Word has length 101 [2020-11-11 15:13:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:28,555 INFO L481 AbstractCegarLoop]: Abstraction has 2252 states and 6176 transitions. [2020-11-11 15:13:28,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 6176 transitions. [2020-11-11 15:13:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:28,558 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:28,558 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 15:13:28,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:28,759 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:28,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:28,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1844481534, now seen corresponding path program 109 times [2020-11-11 15:13:28,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:28,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286698741] [2020-11-11 15:13:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:29,075 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 15:13:29,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286698741] [2020-11-11 15:13:29,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405872140] [2020-11-11 15:13:29,075 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 15:13:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:29,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:29,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:29,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:29,201 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:29,213 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 15:13:29,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:29,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:13:29,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329850581] [2020-11-11 15:13:29,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:29,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:29,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:29,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:29,214 INFO L87 Difference]: Start difference. First operand 2252 states and 6176 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 15:13:30,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:30,333 INFO L93 Difference]: Finished difference Result 3345 states and 8540 transitions. [2020-11-11 15:13:30,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:13:30,334 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 15:13:30,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:30,338 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:30,338 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:30,339 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=563, Invalid=1789, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:13:30,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:30,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2302. [2020-11-11 15:13:30,367 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 15:13:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 6326 transitions. [2020-11-11 15:13:30,371 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 6326 transitions. Word has length 101 [2020-11-11 15:13:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:30,371 INFO L481 AbstractCegarLoop]: Abstraction has 2302 states and 6326 transitions. [2020-11-11 15:13:30,371 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 15:13:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 6326 transitions. [2020-11-11 15:13:30,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:30,373 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:30,373 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 15:13:30,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:30,574 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:30,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:30,575 INFO L82 PathProgramCache]: Analyzing trace with hash 121942988, now seen corresponding path program 110 times [2020-11-11 15:13:30,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:30,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256738160] [2020-11-11 15:13:30,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:30,875 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 15:13:30,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256738160] [2020-11-11 15:13:30,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026202233] [2020-11-11 15:13:30,875 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 15:13:30,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:30,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:30,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:30,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:30,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:31,002 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 15:13:31,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:31,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-11 15:13:31,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422084192] [2020-11-11 15:13:31,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:31,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:31,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:31,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:31,004 INFO L87 Difference]: Start difference. First operand 2302 states and 6326 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:31,980 INFO L93 Difference]: Finished difference Result 3345 states and 8590 transitions. [2020-11-11 15:13:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:13:31,981 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have 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 15:13:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:31,985 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:31,986 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:31,986 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=609, Invalid=1743, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:13:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2352. [2020-11-11 15:13:32,015 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 15:13:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6476 transitions. [2020-11-11 15:13:32,019 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6476 transitions. Word has length 101 [2020-11-11 15:13:32,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:32,019 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 6476 transitions. [2020-11-11 15:13:32,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:32,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6476 transitions. [2020-11-11 15:13:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:32,021 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:32,022 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 15:13:32,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:32,222 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:32,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:32,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1417592644, now seen corresponding path program 111 times [2020-11-11 15:13:32,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:32,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117667112] [2020-11-11 15:13:32,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:32,530 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 15:13:32,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117667112] [2020-11-11 15:13:32,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831627976] [2020-11-11 15:13:32,530 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 15:13:32,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 15:13:32,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:32,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:32,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:32,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:32,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:32,683 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 15:13:32,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:32,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:13:32,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644802647] [2020-11-11 15:13:32,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:32,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:32,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:32,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:32,684 INFO L87 Difference]: Start difference. First operand 2352 states and 6476 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 15:13:33,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:33,918 INFO L93 Difference]: Finished difference Result 3345 states and 8640 transitions. [2020-11-11 15:13:33,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:13:33,918 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 15:13:33,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:33,922 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:33,922 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:33,923 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=637, Invalid=1913, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:13:33,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2402. [2020-11-11 15:13:33,952 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 15:13:33,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6626 transitions. [2020-11-11 15:13:33,957 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6626 transitions. Word has length 101 [2020-11-11 15:13:33,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:33,957 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 6626 transitions. [2020-11-11 15:13:33,957 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 15:13:33,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6626 transitions. [2020-11-11 15:13:33,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:33,959 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:33,959 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 15:13:34,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:34,160 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:34,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:34,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1520807946, now seen corresponding path program 112 times [2020-11-11 15:13:34,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:34,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637574578] [2020-11-11 15:13:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:34,442 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 15:13:34,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637574578] [2020-11-11 15:13:34,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775671283] [2020-11-11 15:13:34,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:13:34,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:34,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:34,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:13:34,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:34,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:34,558 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 15:13:34,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:34,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-11 15:13:34,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411635859] [2020-11-11 15:13:34,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:34,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:34,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:34,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:34,559 INFO L87 Difference]: Start difference. First operand 2402 states and 6626 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:35,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:35,595 INFO L93 Difference]: Finished difference Result 3345 states and 8690 transitions. [2020-11-11 15:13:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:13:35,596 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have 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 15:13:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:35,600 INFO L225 Difference]: With dead ends: 3345 [2020-11-11 15:13:35,600 INFO L226 Difference]: Without dead ends: 3075 [2020-11-11 15:13:35,600 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=697, Invalid=1853, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:13:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2020-11-11 15:13:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 2452. [2020-11-11 15:13:35,631 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 15:13:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 6776 transitions. [2020-11-11 15:13:35,635 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 6776 transitions. Word has length 101 [2020-11-11 15:13:35,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:35,635 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 6776 transitions. [2020-11-11 15:13:35,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:35,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 6776 transitions. [2020-11-11 15:13:35,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:35,637 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:35,637 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 15:13:35,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-11-11 15:13:35,838 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:35,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:35,839 INFO L82 PathProgramCache]: Analyzing trace with hash -942626566, now seen corresponding path program 113 times [2020-11-11 15:13:35,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:35,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609558773] [2020-11-11 15:13:35,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:36,149 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 15:13:36,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609558773] [2020-11-11 15:13:36,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309175094] [2020-11-11 15:13:36,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:13:36,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 15:13:36,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:36,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:36,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:36,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:36,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:36,315 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 15:13:36,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:36,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 15:13:36,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467276897] [2020-11-11 15:13:36,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:36,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:36,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:36,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:36,316 INFO L87 Difference]: Start difference. First operand 2452 states and 6776 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 15:13:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:37,634 INFO L93 Difference]: Finished difference Result 3390 states and 8860 transitions. [2020-11-11 15:13:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:13:37,635 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 15:13:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:37,640 INFO L225 Difference]: With dead ends: 3390 [2020-11-11 15:13:37,640 INFO L226 Difference]: Without dead ends: 3120 [2020-11-11 15:13:37,641 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=727, Invalid=2029, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:13:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2020-11-11 15:13:37,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2502. [2020-11-11 15:13:37,672 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 15:13:37,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6941 transitions. [2020-11-11 15:13:37,677 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6941 transitions. Word has length 101 [2020-11-11 15:13:37,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:37,677 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6941 transitions. [2020-11-11 15:13:37,677 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 15:13:37,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6941 transitions. [2020-11-11 15:13:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:37,679 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:37,680 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 15:13:37,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-11-11 15:13:37,881 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:37,882 INFO L82 PathProgramCache]: Analyzing trace with hash -313835064, now seen corresponding path program 114 times [2020-11-11 15:13:37,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:37,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193631350] [2020-11-11 15:13:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:38,173 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 15:13:38,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193631350] [2020-11-11 15:13:38,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905054968] [2020-11-11 15:13:38,173 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 15:13:38,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 15:13:38,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:38,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:38,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:38,285 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:38,295 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 15:13:38,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:38,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-11 15:13:38,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745848153] [2020-11-11 15:13:38,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 15:13:38,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:38,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 15:13:38,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-11-11 15:13:38,296 INFO L87 Difference]: Start difference. First operand 2502 states and 6941 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:39,405 INFO L93 Difference]: Finished difference Result 4452 states and 11944 transitions. [2020-11-11 15:13:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:13:39,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have 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 15:13:39,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:39,412 INFO L225 Difference]: With dead ends: 4452 [2020-11-11 15:13:39,412 INFO L226 Difference]: Without dead ends: 4182 [2020-11-11 15:13:39,412 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=802, Invalid=1954, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:13:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4182 states. [2020-11-11 15:13:39,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4182 to 2627. [2020-11-11 15:13:39,474 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 15:13:39,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 7332 transitions. [2020-11-11 15:13:39,479 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 7332 transitions. Word has length 101 [2020-11-11 15:13:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:39,479 INFO L481 AbstractCegarLoop]: Abstraction has 2627 states and 7332 transitions. [2020-11-11 15:13:39,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 7332 transitions. [2020-11-11 15:13:39,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-11 15:13:39,481 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:39,481 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 15:13:39,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-11-11 15:13:39,693 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:39,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:39,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1397372890, now seen corresponding path program 115 times [2020-11-11 15:13:39,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:39,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368278425] [2020-11-11 15:13:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:40,001 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 15:13:40,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368278425] [2020-11-11 15:13:40,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629927757] [2020-11-11 15:13:40,002 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 15:13:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:40,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 15:13:40,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:40,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:40,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:40,153 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 15:13:40,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:40,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-11-11 15:13:40,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207641454] [2020-11-11 15:13:40,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:40,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:40,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:40,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:40,154 INFO L87 Difference]: Start difference. First operand 2627 states and 7332 transitions. Second operand has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:41,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:41,676 INFO L93 Difference]: Finished difference Result 3847 states and 10190 transitions. [2020-11-11 15:13:41,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:13:41,677 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2020-11-11 15:13:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:41,681 INFO L225 Difference]: With dead ends: 3847 [2020-11-11 15:13:41,681 INFO L226 Difference]: Without dead ends: 3320 [2020-11-11 15:13:41,682 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=896, Invalid=2526, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:13:41,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3320 states. [2020-11-11 15:13:41,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3320 to 2637. [2020-11-11 15:13:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2636 states have (on average 2.7830045523520486) internal successors, (7336), 2636 states have internal predecessors, (7336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:41,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 7336 transitions. [2020-11-11 15:13:41,716 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 7336 transitions. Word has length 101 [2020-11-11 15:13:41,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:41,716 INFO L481 AbstractCegarLoop]: Abstraction has 2637 states and 7336 transitions. [2020-11-11 15:13:41,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:41,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 7336 transitions. [2020-11-11 15:13:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:41,719 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:41,719 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 15:13:41,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:41,922 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:41,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:41,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1563127458, now seen corresponding path program 116 times [2020-11-11 15:13:41,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:41,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387476699] [2020-11-11 15:13:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:42,326 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 15:13:42,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387476699] [2020-11-11 15:13:42,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93664569] [2020-11-11 15:13:42,327 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 15:13:42,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:42,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:42,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:13:42,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:42,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:42,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:42,505 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 15:13:42,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:42,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-11-11 15:13:42,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633702517] [2020-11-11 15:13:42,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:13:42,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:42,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:13:42,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:13:42,511 INFO L87 Difference]: Start difference. First operand 2637 states and 7336 transitions. Second operand has 24 states, 24 states have (on average 5.25) internal successors, (126), 24 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 15:13:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:43,355 INFO L93 Difference]: Finished difference Result 3805 states and 10120 transitions. [2020-11-11 15:13:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:43,356 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.25) internal successors, (126), 24 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 106 [2020-11-11 15:13:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:43,361 INFO L225 Difference]: With dead ends: 3805 [2020-11-11 15:13:43,361 INFO L226 Difference]: Without dead ends: 3471 [2020-11-11 15:13:43,361 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=540, Invalid=1530, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:13:43,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3471 states. [2020-11-11 15:13:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3471 to 2722. [2020-11-11 15:13:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2721 states have (on average 2.7585446527012127) internal successors, (7506), 2721 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 7506 transitions. [2020-11-11 15:13:43,402 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 7506 transitions. Word has length 106 [2020-11-11 15:13:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:43,402 INFO L481 AbstractCegarLoop]: Abstraction has 2722 states and 7506 transitions. [2020-11-11 15:13:43,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.25) internal successors, (126), 24 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 15:13:43,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 7506 transitions. [2020-11-11 15:13:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:43,405 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:43,405 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 15:13:43,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-11-11 15:13:43,615 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:43,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:43,615 INFO L82 PathProgramCache]: Analyzing trace with hash 272999308, now seen corresponding path program 117 times [2020-11-11 15:13:43,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:43,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146411620] [2020-11-11 15:13:43,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:44,007 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 15:13:44,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146411620] [2020-11-11 15:13:44,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953137665] [2020-11-11 15:13:44,008 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 15:13:44,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:13:44,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:44,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:44,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:44,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:44,125 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 15:13:44,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:44,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-11-11 15:13:44,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072773632] [2020-11-11 15:13:44,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:44,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:44,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:44,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:44,127 INFO L87 Difference]: Start difference. First operand 2722 states and 7506 transitions. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:44,797 INFO L93 Difference]: Finished difference Result 4270 states and 10730 transitions. [2020-11-11 15:13:44,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-11 15:13:44,798 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have 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 15:13:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:44,803 INFO L225 Difference]: With dead ends: 4270 [2020-11-11 15:13:44,803 INFO L226 Difference]: Without dead ends: 4000 [2020-11-11 15:13:44,803 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=418, Invalid=1142, Unknown=0, NotChecked=0, Total=1560 [2020-11-11 15:13:44,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4000 states. [2020-11-11 15:13:44,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4000 to 2737. [2020-11-11 15:13:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:13:44,842 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:13:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:44,843 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:13:44,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:44,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:13:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:44,845 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:44,845 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 15:13:45,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:45,046 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:45,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:45,047 INFO L82 PathProgramCache]: Analyzing trace with hash 338891900, now seen corresponding path program 118 times [2020-11-11 15:13:45,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:45,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215402609] [2020-11-11 15:13:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:45,462 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 15:13:45,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215402609] [2020-11-11 15:13:45,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096290695] [2020-11-11 15:13:45,462 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 15:13:45,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:45,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:45,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:13:45,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:45,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:45,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:45,605 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 15:13:45,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:45,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:13:45,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750128501] [2020-11-11 15:13:45,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:45,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:45,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:45,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:45,606 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 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 15:13:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:46,428 INFO L93 Difference]: Finished difference Result 4155 states and 10500 transitions. [2020-11-11 15:13:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:13:46,429 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 15:13:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:46,434 INFO L225 Difference]: With dead ends: 4155 [2020-11-11 15:13:46,434 INFO L226 Difference]: Without dead ends: 3885 [2020-11-11 15:13:46,434 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:13:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2020-11-11 15:13:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 2737. [2020-11-11 15:13:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:13:46,472 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:13:46,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:46,472 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:13:46,472 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 15:13:46,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:13:46,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:46,475 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:46,475 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 15:13:46,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-11-11 15:13:46,676 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:46,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:46,676 INFO L82 PathProgramCache]: Analyzing trace with hash 413193290, now seen corresponding path program 119 times [2020-11-11 15:13:46,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:46,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839823405] [2020-11-11 15:13:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:47,084 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 15:13:47,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839823405] [2020-11-11 15:13:47,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616991559] [2020-11-11 15:13:47,085 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 15:13:47,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:13:47,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:47,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:47,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:47,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:47,210 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 15:13:47,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:47,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-11-11 15:13:47,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918572003] [2020-11-11 15:13:47,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:47,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:47,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:47,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:47,212 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:47,959 INFO L93 Difference]: Finished difference Result 4130 states and 10450 transitions. [2020-11-11 15:13:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 15:13:47,960 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have 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 15:13:47,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:47,964 INFO L225 Difference]: With dead ends: 4130 [2020-11-11 15:13:47,964 INFO L226 Difference]: Without dead ends: 3860 [2020-11-11 15:13:47,964 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=427, Invalid=1295, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 15:13:47,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2020-11-11 15:13:47,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 2737. [2020-11-11 15:13:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:47,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:13:47,998 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:13:47,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:47,998 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:13:47,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:47,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:13:48,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:48,000 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:48,000 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 15:13:48,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:48,208 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:48,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1049211194, now seen corresponding path program 120 times [2020-11-11 15:13:48,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:48,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553778754] [2020-11-11 15:13:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:48,605 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 15:13:48,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553778754] [2020-11-11 15:13:48,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026089311] [2020-11-11 15:13:48,606 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 15:13:48,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:13:48,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:48,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:48,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:48,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:48,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:48,780 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 15:13:48,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:48,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:13:48,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193051815] [2020-11-11 15:13:48,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:48,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:48,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:48,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:48,782 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 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 15:13:49,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:49,719 INFO L93 Difference]: Finished difference Result 4080 states and 10350 transitions. [2020-11-11 15:13:49,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:13:49,719 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 15:13:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:49,724 INFO L225 Difference]: With dead ends: 4080 [2020-11-11 15:13:49,724 INFO L226 Difference]: Without dead ends: 3810 [2020-11-11 15:13:49,725 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:13:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2020-11-11 15:13:49,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 2737. [2020-11-11 15:13:49,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:13:49,762 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:13:49,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:49,762 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:13:49,762 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 15:13:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:13:49,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:49,764 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:49,764 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 15:13:49,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-11-11 15:13:49,966 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:49,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:49,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1159740040, now seen corresponding path program 121 times [2020-11-11 15:13:49,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:49,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407105151] [2020-11-11 15:13:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:50,327 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 15:13:50,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407105151] [2020-11-11 15:13:50,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861123556] [2020-11-11 15:13:50,328 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 15:13:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:50,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:50,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:50,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:50,454 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 15:13:50,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:50,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-11-11 15:13:50,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680639263] [2020-11-11 15:13:50,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:50,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:50,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:50,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:50,455 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:51,284 INFO L93 Difference]: Finished difference Result 4030 states and 10250 transitions. [2020-11-11 15:13:51,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:13:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have 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 15:13:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:51,290 INFO L225 Difference]: With dead ends: 4030 [2020-11-11 15:13:51,290 INFO L226 Difference]: Without dead ends: 3760 [2020-11-11 15:13:51,290 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=452, Invalid=1440, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:13:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2020-11-11 15:13:51,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 2737. [2020-11-11 15:13:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:13:51,323 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:13:51,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:51,323 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:13:51,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:51,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:13:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:51,325 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:51,325 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 15:13:51,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:51,526 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:51,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:51,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1071938696, now seen corresponding path program 122 times [2020-11-11 15:13:51,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:51,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832975388] [2020-11-11 15:13:51,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:51,930 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 15:13:51,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832975388] [2020-11-11 15:13:51,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505437018] [2020-11-11 15:13:51,930 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 15:13:52,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:13:52,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:52,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:52,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:52,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:52,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:52,075 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 15:13:52,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:52,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:13:52,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700830254] [2020-11-11 15:13:52,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:52,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:52,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:52,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:52,077 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 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 15:13:53,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:53,140 INFO L93 Difference]: Finished difference Result 3980 states and 10150 transitions. [2020-11-11 15:13:53,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:13:53,141 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 15:13:53,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:53,146 INFO L225 Difference]: With dead ends: 3980 [2020-11-11 15:13:53,146 INFO L226 Difference]: Without dead ends: 3710 [2020-11-11 15:13:53,147 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=527, Invalid=1729, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:13:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2020-11-11 15:13:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 2737. [2020-11-11 15:13:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:13:53,183 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:13:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:53,183 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:13:53,183 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 15:13:53,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:13:53,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:53,186 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:53,186 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 15:13:53,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-11-11 15:13:53,387 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:53,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1509902778, now seen corresponding path program 123 times [2020-11-11 15:13:53,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:53,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625487700] [2020-11-11 15:13:53,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:53,730 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 15:13:53,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625487700] [2020-11-11 15:13:53,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783269742] [2020-11-11 15:13:53,730 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 15:13:53,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:13:53,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:53,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:53,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:53,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:53,857 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 15:13:53,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:53,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-11-11 15:13:53,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659758070] [2020-11-11 15:13:53,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:53,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:53,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:53,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:53,859 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:54,820 INFO L93 Difference]: Finished difference Result 3930 states and 10050 transitions. [2020-11-11 15:13:54,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:13:54,820 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have 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 15:13:54,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:54,826 INFO L225 Difference]: With dead ends: 3930 [2020-11-11 15:13:54,826 INFO L226 Difference]: Without dead ends: 3660 [2020-11-11 15:13:54,826 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=493, Invalid=1577, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:13:54,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2020-11-11 15:13:54,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 2737. [2020-11-11 15:13:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:13:54,863 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:13:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:54,863 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:13:54,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:54,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:13:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:54,865 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:54,866 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 15:13:55,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-11-11 15:13:55,066 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:55,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:55,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1239771958, now seen corresponding path program 124 times [2020-11-11 15:13:55,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:55,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995821479] [2020-11-11 15:13:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:55,451 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 15:13:55,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995821479] [2020-11-11 15:13:55,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084201421] [2020-11-11 15:13:55,452 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 15:13:55,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:13:55,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:55,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:13:55,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:55,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:55,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:55,599 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 15:13:55,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:55,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:13:55,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442716601] [2020-11-11 15:13:55,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:55,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:55,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:55,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:55,600 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 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 15:13:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:56,900 INFO L93 Difference]: Finished difference Result 3880 states and 9950 transitions. [2020-11-11 15:13:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:13:56,901 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 15:13:56,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:56,906 INFO L225 Difference]: With dead ends: 3880 [2020-11-11 15:13:56,907 INFO L226 Difference]: Without dead ends: 3610 [2020-11-11 15:13:56,907 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=576, Invalid=1874, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:13:56,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-11 15:13:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2737. [2020-11-11 15:13:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:13:56,944 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:13:56,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:56,944 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:13:56,944 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 15:13:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:13:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:56,946 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:56,946 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 15:13:57,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-11-11 15:13:57,163 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:57,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:57,163 INFO L82 PathProgramCache]: Analyzing trace with hash 672606084, now seen corresponding path program 125 times [2020-11-11 15:13:57,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:57,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001100547] [2020-11-11 15:13:57,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:57,493 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 15:13:57,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001100547] [2020-11-11 15:13:57,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564525605] [2020-11-11 15:13:57,493 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 15:13:57,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:13:57,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:57,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:57,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:57,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:57,622 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 15:13:57,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:57,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-11-11 15:13:57,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534172922] [2020-11-11 15:13:57,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:13:57,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:57,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:13:57,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:13:57,623 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:58,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:13:58,655 INFO L93 Difference]: Finished difference Result 3830 states and 9850 transitions. [2020-11-11 15:13:58,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:13:58,656 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have 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 15:13:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:13:58,661 INFO L225 Difference]: With dead ends: 3830 [2020-11-11 15:13:58,661 INFO L226 Difference]: Without dead ends: 3560 [2020-11-11 15:13:58,661 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=550, Invalid=1706, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:13:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2020-11-11 15:13:58,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2737. [2020-11-11 15:13:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:13:58,696 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:13:58,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:13:58,697 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:13:58,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:13:58,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:13:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:13:58,699 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:13:58,699 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 15:13:58,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:13:58,900 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:13:58,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:13:58,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1501317236, now seen corresponding path program 126 times [2020-11-11 15:13:58,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:13:58,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530865523] [2020-11-11 15:13:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:13:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:13:59,248 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 15:13:59,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530865523] [2020-11-11 15:13:59,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869066127] [2020-11-11 15:13:59,248 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 15:13:59,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:13:59,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:13:59,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:13:59,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:13:59,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:13:59,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:13:59,416 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 15:13:59,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:13:59,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:13:59,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616298862] [2020-11-11 15:13:59,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:13:59,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:13:59,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:13:59,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:13:59,418 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 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 15:14:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:00,757 INFO L93 Difference]: Finished difference Result 3780 states and 9750 transitions. [2020-11-11 15:14:00,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:14:00,758 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 15:14:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:00,763 INFO L225 Difference]: With dead ends: 3780 [2020-11-11 15:14:00,763 INFO L226 Difference]: Without dead ends: 3510 [2020-11-11 15:14:00,763 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=641, Invalid=2011, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:14:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2020-11-11 15:14:00,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 2737. [2020-11-11 15:14:00,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:14:00,799 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:14:00,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:00,799 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:14:00,799 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 15:14:00,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:14:00,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:14:00,802 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:00,802 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 15:14:01,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:01,002 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:01,003 INFO L82 PathProgramCache]: Analyzing trace with hash -221221310, now seen corresponding path program 127 times [2020-11-11 15:14:01,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:01,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905263566] [2020-11-11 15:14:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:01,330 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 15:14:01,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905263566] [2020-11-11 15:14:01,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191154937] [2020-11-11 15:14:01,330 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 15:14:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:01,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:14:01,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:01,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:01,469 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 15:14:01,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:01,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-11-11 15:14:01,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787757027] [2020-11-11 15:14:01,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:01,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:01,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:01,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:01,470 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:02,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:02,606 INFO L93 Difference]: Finished difference Result 3730 states and 9650 transitions. [2020-11-11 15:14:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:14:02,606 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have 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 15:14:02,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:02,611 INFO L225 Difference]: With dead ends: 3730 [2020-11-11 15:14:02,611 INFO L226 Difference]: Without dead ends: 3460 [2020-11-11 15:14:02,611 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=623, Invalid=1827, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:14:02,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2020-11-11 15:14:02,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 2737. [2020-11-11 15:14:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:14:02,648 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:14:02,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:02,648 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:14:02,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:02,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:14:02,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:14:02,650 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:02,651 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 15:14:02,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-11-11 15:14:02,851 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:02,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:02,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1760756942, now seen corresponding path program 128 times [2020-11-11 15:14:02,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:02,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866477346] [2020-11-11 15:14:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:03,188 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 15:14:03,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866477346] [2020-11-11 15:14:03,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532134801] [2020-11-11 15:14:03,188 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 15:14:03,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:03,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:03,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:14:03,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:03,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:03,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:03,330 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 15:14:03,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:03,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:14:03,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606704383] [2020-11-11 15:14:03,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:03,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:03,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:03,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:03,332 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 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 15:14:04,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:04,805 INFO L93 Difference]: Finished difference Result 3680 states and 9550 transitions. [2020-11-11 15:14:04,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:14:04,805 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 15:14:04,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:04,810 INFO L225 Difference]: With dead ends: 3680 [2020-11-11 15:14:04,811 INFO L226 Difference]: Without dead ends: 3410 [2020-11-11 15:14:04,811 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=722, Invalid=2140, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:14:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2020-11-11 15:14:04,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 2737. [2020-11-11 15:14:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:04,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:14:04,874 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:14:04,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:04,875 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:14:04,875 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 15:14:04,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:14:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:14:04,877 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:04,877 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 15:14:05,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-11-11 15:14:05,078 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:05,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:05,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1177643648, now seen corresponding path program 129 times [2020-11-11 15:14:05,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:05,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007510839] [2020-11-11 15:14:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:05,396 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 15:14:05,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007510839] [2020-11-11 15:14:05,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956142644] [2020-11-11 15:14:05,397 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 15:14:05,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:14:05,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:05,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:14:05,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:05,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:05,521 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 15:14:05,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:05,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-11-11 15:14:05,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612360931] [2020-11-11 15:14:05,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:05,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:05,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:05,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:05,523 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 transitions. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:06,718 INFO L93 Difference]: Finished difference Result 3630 states and 9450 transitions. [2020-11-11 15:14:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:14:06,719 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have 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 15:14:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:06,724 INFO L225 Difference]: With dead ends: 3630 [2020-11-11 15:14:06,724 INFO L226 Difference]: Without dead ends: 3360 [2020-11-11 15:14:06,724 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=1940, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:14:06,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2020-11-11 15:14:06,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2737. [2020-11-11 15:14:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.754385964912281) internal successors, (7536), 2736 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:06,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7536 transitions. [2020-11-11 15:14:06,760 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7536 transitions. Word has length 106 [2020-11-11 15:14:06,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:06,760 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7536 transitions. [2020-11-11 15:14:06,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7536 transitions. [2020-11-11 15:14:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:14:06,762 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:06,762 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 15:14:06,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:06,963 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:06,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1285790864, now seen corresponding path program 130 times [2020-11-11 15:14:06,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:06,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023042331] [2020-11-11 15:14:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:07,293 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 15:14:07,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023042331] [2020-11-11 15:14:07,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873227091] [2020-11-11 15:14:07,293 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 15:14:07,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:07,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:07,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:07,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:07,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:07,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:07,444 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 15:14:07,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:07,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 15:14:07,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191604818] [2020-11-11 15:14:07,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:07,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:07,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:07,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:07,445 INFO L87 Difference]: Start difference. First operand 2737 states and 7536 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 15:14:09,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:09,035 INFO L93 Difference]: Finished difference Result 3625 states and 9460 transitions. [2020-11-11 15:14:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:14:09,036 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 15:14:09,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:09,040 INFO L225 Difference]: With dead ends: 3625 [2020-11-11 15:14:09,040 INFO L226 Difference]: Without dead ends: 3355 [2020-11-11 15:14:09,041 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=819, Invalid=2261, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:14:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2020-11-11 15:14:09,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 2737. [2020-11-11 15:14:09,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.756213450292398) internal successors, (7541), 2736 states have internal predecessors, (7541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7541 transitions. [2020-11-11 15:14:09,075 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7541 transitions. Word has length 106 [2020-11-11 15:14:09,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:09,076 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7541 transitions. [2020-11-11 15:14:09,076 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 15:14:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7541 transitions. [2020-11-11 15:14:09,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:14:09,078 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:09,078 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 15:14:09,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:09,279 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:09,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:09,280 INFO L82 PathProgramCache]: Analyzing trace with hash -656999362, now seen corresponding path program 131 times [2020-11-11 15:14:09,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:09,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708814790] [2020-11-11 15:14:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:09,602 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 15:14:09,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708814790] [2020-11-11 15:14:09,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526515764] [2020-11-11 15:14:09,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:14:09,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:14:09,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:09,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:14:09,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:09,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:09,730 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 15:14:09,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:09,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-11-11 15:14:09,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61488296] [2020-11-11 15:14:09,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 15:14:09,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:09,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 15:14:09,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-11-11 15:14:09,731 INFO L87 Difference]: Start difference. First operand 2737 states and 7541 transitions. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:11,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:11,021 INFO L93 Difference]: Finished difference Result 4712 states and 12594 transitions. [2020-11-11 15:14:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:14:11,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have 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 15:14:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:11,028 INFO L225 Difference]: With dead ends: 4712 [2020-11-11 15:14:11,028 INFO L226 Difference]: Without dead ends: 4442 [2020-11-11 15:14:11,028 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=818, Invalid=2044, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:14:11,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4442 states. [2020-11-11 15:14:11,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4442 to 2862. [2020-11-11 15:14:11,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 2.772457182803216) internal successors, (7932), 2861 states have internal predecessors, (7932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 7932 transitions. [2020-11-11 15:14:11,072 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 7932 transitions. Word has length 106 [2020-11-11 15:14:11,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:11,072 INFO L481 AbstractCegarLoop]: Abstraction has 2862 states and 7932 transitions. [2020-11-11 15:14:11,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:11,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 7932 transitions. [2020-11-11 15:14:11,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-11 15:14:11,075 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:11,075 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 15:14:11,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:11,275 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:11,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:11,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1054208592, now seen corresponding path program 132 times [2020-11-11 15:14:11,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:11,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093529516] [2020-11-11 15:14:11,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:11,641 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 15:14:11,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093529516] [2020-11-11 15:14:11,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399131628] [2020-11-11 15:14:11,641 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 15:14:11,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:14:11,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:11,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:14:11,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:11,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:11,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:11,818 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 15:14:11,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:11,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-11 15:14:11,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789318809] [2020-11-11 15:14:11,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:11,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:11,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:11,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:11,819 INFO L87 Difference]: Start difference. First operand 2862 states and 7932 transitions. Second operand has 23 states, 23 states have (on average 4.739130434782608) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:13,663 INFO L93 Difference]: Finished difference Result 4087 states and 10750 transitions. [2020-11-11 15:14:13,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:14:13,664 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.739130434782608) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2020-11-11 15:14:13,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:13,668 INFO L225 Difference]: With dead ends: 4087 [2020-11-11 15:14:13,668 INFO L226 Difference]: Without dead ends: 3560 [2020-11-11 15:14:13,669 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:14:13,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2020-11-11 15:14:13,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2112. [2020-11-11 15:14:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 2.6887730933207012) internal successors, (5676), 2111 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 15:14:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 5676 transitions. [2020-11-11 15:14:13,700 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 5676 transitions. Word has length 106 [2020-11-11 15:14:13,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:13,701 INFO L481 AbstractCegarLoop]: Abstraction has 2112 states and 5676 transitions. [2020-11-11 15:14:13,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.739130434782608) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:13,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 5676 transitions. [2020-11-11 15:14:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:13,702 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:13,702 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 15:14:13,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-11-11 15:14:13,903 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:13,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:13,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1102839963, now seen corresponding path program 133 times [2020-11-11 15:14:13,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:13,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096085554] [2020-11-11 15:14:13,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:14,329 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 15:14:14,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096085554] [2020-11-11 15:14:14,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149762574] [2020-11-11 15:14:14,330 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 15:14:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:14,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:14,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:14,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:14,460 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 15:14:14,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:14,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:14:14,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169891743] [2020-11-11 15:14:14,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:14,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:14,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:14,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:14,461 INFO L87 Difference]: Start difference. First operand 2112 states and 5676 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 15:14:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:15,325 INFO L93 Difference]: Finished difference Result 3305 states and 8240 transitions. [2020-11-11 15:14:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:14:15,326 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 15:14:15,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:15,329 INFO L225 Difference]: With dead ends: 3305 [2020-11-11 15:14:15,329 INFO L226 Difference]: Without dead ends: 3035 [2020-11-11 15:14:15,329 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:14:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2020-11-11 15:14:15,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 2162. [2020-11-11 15:14:15,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 2.695974086071263) internal successors, (5826), 2161 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 15:14:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 5826 transitions. [2020-11-11 15:14:15,359 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 5826 transitions. Word has length 111 [2020-11-11 15:14:15,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:15,359 INFO L481 AbstractCegarLoop]: Abstraction has 2162 states and 5826 transitions. [2020-11-11 15:14:15,359 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 15:14:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 5826 transitions. [2020-11-11 15:14:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:15,361 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:15,361 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 15:14:15,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-11-11 15:14:15,561 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:15,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:15,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1036947371, now seen corresponding path program 134 times [2020-11-11 15:14:15,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:15,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110761359] [2020-11-11 15:14:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:16,015 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 15:14:16,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110761359] [2020-11-11 15:14:16,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888521241] [2020-11-11 15:14:16,016 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 15:14:16,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:16,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:16,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:16,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:16,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:16,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:16,165 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 15:14:16,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:16,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:14:16,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949968397] [2020-11-11 15:14:16,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:16,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:16,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:16,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:16,166 INFO L87 Difference]: Start difference. First operand 2162 states and 5826 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 15:14:17,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:17,082 INFO L93 Difference]: Finished difference Result 3700 states and 9080 transitions. [2020-11-11 15:14:17,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:14:17,083 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 15:14:17,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:17,088 INFO L225 Difference]: With dead ends: 3700 [2020-11-11 15:14:17,088 INFO L226 Difference]: Without dead ends: 3430 [2020-11-11 15:14:17,088 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:14:17,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2020-11-11 15:14:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 2212. [2020-11-11 15:14:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2211 states have (on average 2.7028493894165537) internal successors, (5976), 2211 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 15:14:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 5976 transitions. [2020-11-11 15:14:17,119 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 5976 transitions. Word has length 111 [2020-11-11 15:14:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:17,119 INFO L481 AbstractCegarLoop]: Abstraction has 2212 states and 5976 transitions. [2020-11-11 15:14:17,119 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 15:14:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 5976 transitions. [2020-11-11 15:14:17,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:17,121 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:17,121 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 15:14:17,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-11-11 15:14:17,322 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:17,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:17,322 INFO L82 PathProgramCache]: Analyzing trace with hash -962645981, now seen corresponding path program 135 times [2020-11-11 15:14:17,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:17,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330978138] [2020-11-11 15:14:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:17,739 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 15:14:17,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330978138] [2020-11-11 15:14:17,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426170147] [2020-11-11 15:14:17,740 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 15:14:17,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:14:17,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:17,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:17,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:17,848 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:17,863 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 15:14:17,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:17,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:14:17,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004695008] [2020-11-11 15:14:17,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:17,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:17,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:17,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:17,865 INFO L87 Difference]: Start difference. First operand 2212 states and 5976 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 15:14:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:18,790 INFO L93 Difference]: Finished difference Result 3705 states and 9140 transitions. [2020-11-11 15:14:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:14:18,790 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 15:14:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:18,795 INFO L225 Difference]: With dead ends: 3705 [2020-11-11 15:14:18,795 INFO L226 Difference]: Without dead ends: 3435 [2020-11-11 15:14:18,795 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2020-11-11 15:14:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-11-11 15:14:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2262. [2020-11-11 15:14:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2261 states have (on average 2.7094206103494027) internal successors, (6126), 2261 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 15:14:18,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 6126 transitions. [2020-11-11 15:14:18,824 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 6126 transitions. Word has length 111 [2020-11-11 15:14:18,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:18,824 INFO L481 AbstractCegarLoop]: Abstraction has 2262 states and 6126 transitions. [2020-11-11 15:14:18,824 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 15:14:18,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 6126 transitions. [2020-11-11 15:14:18,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:18,826 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:18,826 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 15:14:19,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-11-11 15:14:19,027 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:19,027 INFO L82 PathProgramCache]: Analyzing trace with hash -326628077, now seen corresponding path program 136 times [2020-11-11 15:14:19,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:19,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788259799] [2020-11-11 15:14:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:19,459 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 15:14:19,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788259799] [2020-11-11 15:14:19,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817936605] [2020-11-11 15:14:19,459 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 15:14:19,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:19,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:19,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:14:19,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:19,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:19,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:19,619 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 15:14:19,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:19,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:14:19,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781652343] [2020-11-11 15:14:19,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:19,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:19,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:19,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:19,621 INFO L87 Difference]: Start difference. First operand 2262 states and 6126 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 15:14:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:20,711 INFO L93 Difference]: Finished difference Result 3705 states and 9190 transitions. [2020-11-11 15:14:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:14:20,711 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 15:14:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:20,716 INFO L225 Difference]: With dead ends: 3705 [2020-11-11 15:14:20,716 INFO L226 Difference]: Without dead ends: 3435 [2020-11-11 15:14:20,716 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=553, Invalid=1799, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:14:20,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-11-11 15:14:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2312. [2020-11-11 15:14:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2311 states have (on average 2.7157074859368238) internal successors, (6276), 2311 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 15:14:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 6276 transitions. [2020-11-11 15:14:20,753 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 6276 transitions. Word has length 111 [2020-11-11 15:14:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:20,753 INFO L481 AbstractCegarLoop]: Abstraction has 2312 states and 6276 transitions. [2020-11-11 15:14:20,753 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 15:14:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 6276 transitions. [2020-11-11 15:14:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:20,755 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:20,755 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 15:14:20,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-11-11 15:14:20,956 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:20,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:20,957 INFO L82 PathProgramCache]: Analyzing trace with hash -216099231, now seen corresponding path program 137 times [2020-11-11 15:14:20,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:20,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24635383] [2020-11-11 15:14:20,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:21,456 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 15:14:21,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24635383] [2020-11-11 15:14:21,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141336879] [2020-11-11 15:14:21,457 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 15:14:21,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:14:21,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:21,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:21,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:21,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:21,663 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 15:14:21,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:21,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:14:21,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473776227] [2020-11-11 15:14:21,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:21,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:21,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:21,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:21,665 INFO L87 Difference]: Start difference. First operand 2312 states and 6276 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 15:14:22,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:22,673 INFO L93 Difference]: Finished difference Result 3705 states and 9240 transitions. [2020-11-11 15:14:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:14:22,674 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 15:14:22,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:22,679 INFO L225 Difference]: With dead ends: 3705 [2020-11-11 15:14:22,679 INFO L226 Difference]: Without dead ends: 3435 [2020-11-11 15:14:22,679 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:14:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-11-11 15:14:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2362. [2020-11-11 15:14:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2361 states have (on average 2.721728081321474) internal successors, (6426), 2361 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 15:14:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 6426 transitions. [2020-11-11 15:14:22,713 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 6426 transitions. Word has length 111 [2020-11-11 15:14:22,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:22,714 INFO L481 AbstractCegarLoop]: Abstraction has 2362 states and 6426 transitions. [2020-11-11 15:14:22,714 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 15:14:22,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 6426 transitions. [2020-11-11 15:14:22,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:22,716 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:22,716 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 15:14:22,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-11-11 15:14:22,917 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1847189329, now seen corresponding path program 138 times [2020-11-11 15:14:22,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:22,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728596067] [2020-11-11 15:14:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:23,333 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 15:14:23,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728596067] [2020-11-11 15:14:23,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285995593] [2020-11-11 15:14:23,334 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 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 15:14:23,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:14:23,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:23,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:23,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:23,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:23,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:23,505 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 15:14:23,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:23,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:14:23,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428718531] [2020-11-11 15:14:23,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:23,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:23,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:23,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:23,507 INFO L87 Difference]: Start difference. First operand 2362 states and 6426 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 15:14:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:24,733 INFO L93 Difference]: Finished difference Result 3705 states and 9290 transitions. [2020-11-11 15:14:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:14:24,734 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 15:14:24,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:24,739 INFO L225 Difference]: With dead ends: 3705 [2020-11-11 15:14:24,739 INFO L226 Difference]: Without dead ends: 3435 [2020-11-11 15:14:24,739 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:14:24,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-11-11 15:14:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2412. [2020-11-11 15:14:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.7274989630858566) internal successors, (6576), 2411 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 15:14:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 6576 transitions. [2020-11-11 15:14:24,795 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 6576 transitions. Word has length 111 [2020-11-11 15:14:24,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:24,796 INFO L481 AbstractCegarLoop]: Abstraction has 2412 states and 6576 transitions. [2020-11-11 15:14:24,796 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 15:14:24,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 6576 transitions. [2020-11-11 15:14:24,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:24,798 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:24,798 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 15:14:24,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:24,999 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1409225247, now seen corresponding path program 139 times [2020-11-11 15:14:25,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:25,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328485989] [2020-11-11 15:14:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:25,370 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 15:14:25,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328485989] [2020-11-11 15:14:25,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068057103] [2020-11-11 15:14:25,371 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 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 15:14:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:25,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:25,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:25,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:25,501 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 15:14:25,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:25,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:14:25,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280445909] [2020-11-11 15:14:25,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:25,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:25,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:25,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:25,502 INFO L87 Difference]: Start difference. First operand 2412 states and 6576 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 15:14:26,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:26,589 INFO L93 Difference]: Finished difference Result 3705 states and 9340 transitions. [2020-11-11 15:14:26,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:14:26,590 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 15:14:26,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:26,595 INFO L225 Difference]: With dead ends: 3705 [2020-11-11 15:14:26,595 INFO L226 Difference]: Without dead ends: 3435 [2020-11-11 15:14:26,595 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=1927, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 15:14:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-11-11 15:14:26,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2462. [2020-11-11 15:14:26,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 2.733035351483137) internal successors, (6726), 2461 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 15:14:26,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 6726 transitions. [2020-11-11 15:14:26,635 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 6726 transitions. Word has length 111 [2020-11-11 15:14:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:26,636 INFO L481 AbstractCegarLoop]: Abstraction has 2462 states and 6726 transitions. [2020-11-11 15:14:26,636 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 15:14:26,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 6726 transitions. [2020-11-11 15:14:26,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:26,638 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:26,639 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 15:14:26,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-11-11 15:14:26,852 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:26,852 INFO L82 PathProgramCache]: Analyzing trace with hash -136067313, now seen corresponding path program 140 times [2020-11-11 15:14:26,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:26,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055257297] [2020-11-11 15:14:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:27,246 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 15:14:27,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055257297] [2020-11-11 15:14:27,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111707759] [2020-11-11 15:14:27,246 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 15:14:27,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:27,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:27,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:27,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:27,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:27,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:27,401 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 15:14:27,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:27,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:14:27,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945060667] [2020-11-11 15:14:27,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:27,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:27,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:27,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:27,403 INFO L87 Difference]: Start difference. First operand 2462 states and 6726 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 15:14:28,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:28,748 INFO L93 Difference]: Finished difference Result 3705 states and 9390 transitions. [2020-11-11 15:14:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:14:28,749 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 15:14:28,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:28,753 INFO L225 Difference]: With dead ends: 3705 [2020-11-11 15:14:28,753 INFO L226 Difference]: Without dead ends: 3435 [2020-11-11 15:14:28,754 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:14:28,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-11-11 15:14:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2512. [2020-11-11 15:14:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 2511 states have (on average 2.738351254480287) internal successors, (6876), 2511 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 15:14:28,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 6876 transitions. [2020-11-11 15:14:28,790 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 6876 transitions. Word has length 111 [2020-11-11 15:14:28,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:28,790 INFO L481 AbstractCegarLoop]: Abstraction has 2512 states and 6876 transitions. [2020-11-11 15:14:28,790 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 15:14:28,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 6876 transitions. [2020-11-11 15:14:28,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:28,792 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:28,792 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 15:14:28,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:28,993 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:28,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:28,993 INFO L82 PathProgramCache]: Analyzing trace with hash -703233187, now seen corresponding path program 141 times [2020-11-11 15:14:28,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:28,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412448096] [2020-11-11 15:14:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:29,362 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 15:14:29,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412448096] [2020-11-11 15:14:29,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119151687] [2020-11-11 15:14:29,363 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 15:14:29,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:14:29,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:29,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:29,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:29,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:29,491 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 15:14:29,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:29,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:14:29,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625231319] [2020-11-11 15:14:29,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:29,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:29,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:29,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:29,492 INFO L87 Difference]: Start difference. First operand 2512 states and 6876 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 15:14:30,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:30,644 INFO L93 Difference]: Finished difference Result 3705 states and 9440 transitions. [2020-11-11 15:14:30,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:14:30,645 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 15:14:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:30,650 INFO L225 Difference]: With dead ends: 3705 [2020-11-11 15:14:30,650 INFO L226 Difference]: Without dead ends: 3435 [2020-11-11 15:14:30,651 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2020-11-11 15:14:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-11-11 15:14:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2562. [2020-11-11 15:14:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2562 states, 2561 states have (on average 2.74345958609918) internal successors, (7026), 2561 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 15:14:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 7026 transitions. [2020-11-11 15:14:30,685 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 7026 transitions. Word has length 111 [2020-11-11 15:14:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:30,685 INFO L481 AbstractCegarLoop]: Abstraction has 2562 states and 7026 transitions. [2020-11-11 15:14:30,685 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 15:14:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 7026 transitions. [2020-11-11 15:14:30,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:30,687 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:30,688 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 15:14:30,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:30,888 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:30,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:30,889 INFO L82 PathProgramCache]: Analyzing trace with hash 125477965, now seen corresponding path program 142 times [2020-11-11 15:14:30,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:30,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679806472] [2020-11-11 15:14:30,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:31,277 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 15:14:31,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679806472] [2020-11-11 15:14:31,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213137911] [2020-11-11 15:14:31,277 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 15:14:31,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:31,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:31,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:14:31,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:31,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:31,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:31,448 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 15:14:31,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:31,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:14:31,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837615792] [2020-11-11 15:14:31,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:31,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:31,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:31,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:31,450 INFO L87 Difference]: Start difference. First operand 2562 states and 7026 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 15:14:32,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:32,969 INFO L93 Difference]: Finished difference Result 3705 states and 9490 transitions. [2020-11-11 15:14:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:14:32,970 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 15:14:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:32,975 INFO L225 Difference]: With dead ends: 3705 [2020-11-11 15:14:32,975 INFO L226 Difference]: Without dead ends: 3435 [2020-11-11 15:14:32,976 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:14:32,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-11-11 15:14:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2612. [2020-11-11 15:14:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2612 states, 2611 states have (on average 2.7483722711604748) internal successors, (7176), 2611 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 15:14:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2612 states to 2612 states and 7176 transitions. [2020-11-11 15:14:33,017 INFO L78 Accepts]: Start accepts. Automaton has 2612 states and 7176 transitions. Word has length 111 [2020-11-11 15:14:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:33,017 INFO L481 AbstractCegarLoop]: Abstraction has 2612 states and 7176 transitions. [2020-11-11 15:14:33,017 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 15:14:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2612 states and 7176 transitions. [2020-11-11 15:14:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:33,019 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:33,019 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 15:14:33,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:33,220 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:33,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:33,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1597060581, now seen corresponding path program 143 times [2020-11-11 15:14:33,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:33,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294106238] [2020-11-11 15:14:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:33,605 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 15:14:33,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294106238] [2020-11-11 15:14:33,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148797335] [2020-11-11 15:14:33,605 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 15:14:33,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 15:14:33,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:33,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:33,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:33,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:33,731 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 15:14:33,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:33,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:14:33,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214470094] [2020-11-11 15:14:33,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:33,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:33,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:33,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:33,732 INFO L87 Difference]: Start difference. First operand 2612 states and 7176 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 15:14:34,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:34,995 INFO L93 Difference]: Finished difference Result 3705 states and 9540 transitions. [2020-11-11 15:14:34,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:14:34,996 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 15:14:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:35,001 INFO L225 Difference]: With dead ends: 3705 [2020-11-11 15:14:35,001 INFO L226 Difference]: Without dead ends: 3435 [2020-11-11 15:14:35,001 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=779, Invalid=2191, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 15:14:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-11-11 15:14:35,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2662. [2020-11-11 15:14:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2661 states have (on average 2.7531003382187147) internal successors, (7326), 2661 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 15:14:35,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 7326 transitions. [2020-11-11 15:14:35,038 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 7326 transitions. Word has length 111 [2020-11-11 15:14:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:35,038 INFO L481 AbstractCegarLoop]: Abstraction has 2662 states and 7326 transitions. [2020-11-11 15:14:35,038 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 15:14:35,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 7326 transitions. [2020-11-11 15:14:35,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:35,040 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:35,040 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 15:14:35,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:35,241 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:35,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:35,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1158371083, now seen corresponding path program 144 times [2020-11-11 15:14:35,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:35,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665086794] [2020-11-11 15:14:35,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:35,615 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 15:14:35,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665086794] [2020-11-11 15:14:35,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402019428] [2020-11-11 15:14:35,616 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 15:14:35,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 15:14:35,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:35,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:35,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:35,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:35,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:35,777 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 15:14:35,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:35,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:14:35,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017212555] [2020-11-11 15:14:35,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:35,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:35,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:35,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:35,778 INFO L87 Difference]: Start difference. First operand 2662 states and 7326 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 15:14:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:37,370 INFO L93 Difference]: Finished difference Result 3705 states and 9590 transitions. [2020-11-11 15:14:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:14:37,371 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 15:14:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:37,375 INFO L225 Difference]: With dead ends: 3705 [2020-11-11 15:14:37,375 INFO L226 Difference]: Without dead ends: 3435 [2020-11-11 15:14:37,376 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=809, Invalid=2383, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 15:14:37,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-11-11 15:14:37,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2712. [2020-11-11 15:14:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 2.7576540022132057) internal successors, (7476), 2711 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 15:14:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 7476 transitions. [2020-11-11 15:14:37,415 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 7476 transitions. Word has length 111 [2020-11-11 15:14:37,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:37,415 INFO L481 AbstractCegarLoop]: Abstraction has 2712 states and 7476 transitions. [2020-11-11 15:14:37,415 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 15:14:37,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 7476 transitions. [2020-11-11 15:14:37,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:37,418 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:37,418 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 15:14:37,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-11-11 15:14:37,618 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:37,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:37,619 INFO L82 PathProgramCache]: Analyzing trace with hash -198195623, now seen corresponding path program 145 times [2020-11-11 15:14:37,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:37,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177354245] [2020-11-11 15:14:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:37,974 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 15:14:37,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177354245] [2020-11-11 15:14:37,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784691526] [2020-11-11 15:14:37,974 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 15:14:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:38,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:38,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:38,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:38,119 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 15:14:38,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:38,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:14:38,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818277866] [2020-11-11 15:14:38,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:38,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:38,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:38,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:38,120 INFO L87 Difference]: Start difference. First operand 2712 states and 7476 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 15:14:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:39,443 INFO L93 Difference]: Finished difference Result 3735 states and 9715 transitions. [2020-11-11 15:14:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:14:39,444 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 15:14:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:39,449 INFO L225 Difference]: With dead ends: 3735 [2020-11-11 15:14:39,449 INFO L226 Difference]: Without dead ends: 3465 [2020-11-11 15:14:39,450 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=881, Invalid=2311, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 15:14:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2020-11-11 15:14:39,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 2762. [2020-11-11 15:14:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2762 states, 2761 states have (on average 2.765664614270192) internal successors, (7636), 2761 states have internal predecessors, (7636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 7636 transitions. [2020-11-11 15:14:39,490 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 7636 transitions. Word has length 111 [2020-11-11 15:14:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:39,491 INFO L481 AbstractCegarLoop]: Abstraction has 2762 states and 7636 transitions. [2020-11-11 15:14:39,491 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 15:14:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 7636 transitions. [2020-11-11 15:14:39,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:39,493 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:39,493 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 15:14:39,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-11-11 15:14:39,694 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:39,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:39,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1633337161, now seen corresponding path program 146 times [2020-11-11 15:14:39,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:39,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879658038] [2020-11-11 15:14:39,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:40,068 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 15:14:40,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879658038] [2020-11-11 15:14:40,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417005788] [2020-11-11 15:14:40,069 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 15:14:40,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:40,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:40,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:40,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:40,187 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:40,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:40,221 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 15:14:40,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:40,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 15:14:40,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260493367] [2020-11-11 15:14:40,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:40,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:40,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:40,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:40,222 INFO L87 Difference]: Start difference. First operand 2762 states and 7636 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 15:14:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:42,090 INFO L93 Difference]: Finished difference Result 4194 states and 10984 transitions. [2020-11-11 15:14:42,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:14:42,091 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 15:14:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:42,095 INFO L225 Difference]: With dead ends: 4194 [2020-11-11 15:14:42,095 INFO L226 Difference]: Without dead ends: 3625 [2020-11-11 15:14:42,096 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=934, Invalid=2726, Unknown=0, NotChecked=0, Total=3660 [2020-11-11 15:14:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2020-11-11 15:14:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 2812. [2020-11-11 15:14:42,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2811 states have (on average 2.7716115261472787) internal successors, (7791), 2811 states have internal predecessors, (7791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 7791 transitions. [2020-11-11 15:14:42,133 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 7791 transitions. Word has length 111 [2020-11-11 15:14:42,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:42,133 INFO L481 AbstractCegarLoop]: Abstraction has 2812 states and 7791 transitions. [2020-11-11 15:14:42,133 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 15:14:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 7791 transitions. [2020-11-11 15:14:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:42,135 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:42,135 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 15:14:42,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-11-11 15:14:42,336 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:42,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:42,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2032838633, now seen corresponding path program 147 times [2020-11-11 15:14:42,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:42,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854012900] [2020-11-11 15:14:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:42,698 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 15:14:42,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854012900] [2020-11-11 15:14:42,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305699753] [2020-11-11 15:14:42,698 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 15:14:42,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 15:14:42,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:42,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 15:14:42,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:42,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:42,831 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 15:14:42,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:42,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 15:14:42,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838466703] [2020-11-11 15:14:42,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 15:14:42,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:42,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 15:14:42,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-11-11 15:14:42,832 INFO L87 Difference]: Start difference. First operand 2812 states and 7791 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 15:14:44,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:44,242 INFO L93 Difference]: Finished difference Result 4812 states and 12894 transitions. [2020-11-11 15:14:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:14:44,243 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 15:14:44,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:44,249 INFO L225 Difference]: With dead ends: 4812 [2020-11-11 15:14:44,249 INFO L226 Difference]: Without dead ends: 4542 [2020-11-11 15:14:44,250 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1000, Invalid=2422, Unknown=0, NotChecked=0, Total=3422 [2020-11-11 15:14:44,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4542 states. [2020-11-11 15:14:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4542 to 2937. [2020-11-11 15:14:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2937 states, 2936 states have (on average 2.786784741144414) internal successors, (8182), 2936 states have internal predecessors, (8182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2937 states to 2937 states and 8182 transitions. [2020-11-11 15:14:44,294 INFO L78 Accepts]: Start accepts. Automaton has 2937 states and 8182 transitions. Word has length 111 [2020-11-11 15:14:44,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:44,294 INFO L481 AbstractCegarLoop]: Abstraction has 2937 states and 8182 transitions. [2020-11-11 15:14:44,294 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 15:14:44,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2937 states and 8182 transitions. [2020-11-11 15:14:44,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-11 15:14:44,296 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:44,296 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 15:14:44,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-11-11 15:14:44,497 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:44,498 INFO L82 PathProgramCache]: Analyzing trace with hash -321630679, now seen corresponding path program 148 times [2020-11-11 15:14:44,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:44,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418238482] [2020-11-11 15:14:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:44,892 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 15:14:44,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418238482] [2020-11-11 15:14:44,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276796364] [2020-11-11 15:14:44,894 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 15:14:44,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:44,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:44,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:14:44,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:45,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:45,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:45,088 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 15:14:45,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:45,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-11-11 15:14:45,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800668351] [2020-11-11 15:14:45,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:14:45,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:45,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:14:45,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:14:45,089 INFO L87 Difference]: Start difference. First operand 2937 states and 8182 transitions. Second operand has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:46,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:46,965 INFO L93 Difference]: Finished difference Result 4207 states and 11140 transitions. [2020-11-11 15:14:46,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:14:46,966 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2020-11-11 15:14:46,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:46,971 INFO L225 Difference]: With dead ends: 4207 [2020-11-11 15:14:46,971 INFO L226 Difference]: Without dead ends: 3680 [2020-11-11 15:14:46,971 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1100, Invalid=3060, Unknown=0, NotChecked=0, Total=4160 [2020-11-11 15:14:46,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2020-11-11 15:14:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 2051. [2020-11-11 15:14:46,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 2.691707317073171) internal successors, (5518), 2050 states have internal predecessors, (5518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 5518 transitions. [2020-11-11 15:14:47,003 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 5518 transitions. Word has length 111 [2020-11-11 15:14:47,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:47,003 INFO L481 AbstractCegarLoop]: Abstraction has 2051 states and 5518 transitions. [2020-11-11 15:14:47,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.75) internal successors, (114), 24 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:47,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 5518 transitions. [2020-11-11 15:14:47,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:47,005 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:47,005 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 15:14:47,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:47,208 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:47,209 INFO L82 PathProgramCache]: Analyzing trace with hash -475852177, now seen corresponding path program 149 times [2020-11-11 15:14:47,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:47,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968674449] [2020-11-11 15:14:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:47,716 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 15:14:47,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968674449] [2020-11-11 15:14:47,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55885825] [2020-11-11 15:14:47,716 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 15:14:47,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:14:47,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:47,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:14:47,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:47,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:47,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:47,895 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 15:14:47,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:47,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:14:47,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364418590] [2020-11-11 15:14:47,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:14:47,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:47,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:14:47,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:14:47,897 INFO L87 Difference]: Start difference. First operand 2051 states and 5518 transitions. Second operand has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 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 15:14:49,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:49,000 INFO L93 Difference]: Finished difference Result 3269 states and 8402 transitions. [2020-11-11 15:14:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:14:49,001 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 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 116 [2020-11-11 15:14:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:49,005 INFO L225 Difference]: With dead ends: 3269 [2020-11-11 15:14:49,005 INFO L226 Difference]: Without dead ends: 2935 [2020-11-11 15:14:49,005 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=645, Invalid=1805, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:14:49,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2020-11-11 15:14:49,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 2136. [2020-11-11 15:14:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 2.664168618266979) internal successors, (5688), 2135 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:14:49,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 5688 transitions. [2020-11-11 15:14:49,034 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 5688 transitions. Word has length 116 [2020-11-11 15:14:49,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:49,035 INFO L481 AbstractCegarLoop]: Abstraction has 2136 states and 5688 transitions. [2020-11-11 15:14:49,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 26 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 15:14:49,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 5688 transitions. [2020-11-11 15:14:49,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:49,037 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:49,037 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 15:14:49,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-11-11 15:14:49,237 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:49,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:49,238 INFO L82 PathProgramCache]: Analyzing trace with hash -847396067, now seen corresponding path program 150 times [2020-11-11 15:14:49,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:49,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219679742] [2020-11-11 15:14:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:49,728 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 15:14:49,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219679742] [2020-11-11 15:14:49,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701711112] [2020-11-11 15:14:49,728 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 15:14:49,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:14:49,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:49,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:49,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:49,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:49,858 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 15:14:49,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:49,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:14:49,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043275253] [2020-11-11 15:14:49,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:49,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:49,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:49,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:49,859 INFO L87 Difference]: Start difference. First operand 2136 states and 5688 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:14:50,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:50,724 INFO L93 Difference]: Finished difference Result 3920 states and 9470 transitions. [2020-11-11 15:14:50,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 15:14:50,724 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 116 [2020-11-11 15:14:50,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:50,729 INFO L225 Difference]: With dead ends: 3920 [2020-11-11 15:14:50,729 INFO L226 Difference]: Without dead ends: 3650 [2020-11-11 15:14:50,730 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2020-11-11 15:14:50,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3650 states. [2020-11-11 15:14:50,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3650 to 2237. [2020-11-11 15:14:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 2.67262969588551) internal successors, (5976), 2236 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 15:14:50,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 5976 transitions. [2020-11-11 15:14:50,763 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 5976 transitions. Word has length 116 [2020-11-11 15:14:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:50,763 INFO L481 AbstractCegarLoop]: Abstraction has 2237 states and 5976 transitions. [2020-11-11 15:14:50,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:14:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 5976 transitions. [2020-11-11 15:14:50,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:50,765 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:50,765 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 15:14:50,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:50,965 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:50,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:50,966 INFO L82 PathProgramCache]: Analyzing trace with hash 835110925, now seen corresponding path program 151 times [2020-11-11 15:14:50,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:50,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569949337] [2020-11-11 15:14:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:51,488 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 15:14:51,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569949337] [2020-11-11 15:14:51,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710018800] [2020-11-11 15:14:51,488 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 15:14:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:51,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:51,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:51,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:51,661 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 15:14:51,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:51,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:14:51,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683986361] [2020-11-11 15:14:51,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:14:51,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:51,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:14:51,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:14:51,662 INFO L87 Difference]: Start difference. First operand 2237 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 15:14:52,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:52,677 INFO L93 Difference]: Finished difference Result 3855 states and 9390 transitions. [2020-11-11 15:14:52,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:14:52,677 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 15:14:52,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:52,681 INFO L225 Difference]: With dead ends: 3855 [2020-11-11 15:14:52,682 INFO L226 Difference]: Without dead ends: 3585 [2020-11-11 15:14:52,682 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:14:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2020-11-11 15:14:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 2287. [2020-11-11 15:14:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2286 states have (on average 2.679790026246719) internal successors, (6126), 2286 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 15:14:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 6126 transitions. [2020-11-11 15:14:52,724 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 6126 transitions. Word has length 116 [2020-11-11 15:14:52,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:52,724 INFO L481 AbstractCegarLoop]: Abstraction has 2287 states and 6126 transitions. [2020-11-11 15:14:52,724 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 15:14:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 6126 transitions. [2020-11-11 15:14:52,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:52,727 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:52,727 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 15:14:52,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:52,942 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:52,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:52,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1017536933, now seen corresponding path program 152 times [2020-11-11 15:14:52,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:52,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855981766] [2020-11-11 15:14:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:53,419 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 15:14:53,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855981766] [2020-11-11 15:14:53,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88934300] [2020-11-11 15:14:53,419 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 15:14:53,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:14:53,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:53,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:53,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:53,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:53,545 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 15:14:53,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:53,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:14:53,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809705571] [2020-11-11 15:14:53,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:53,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:53,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:53,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:53,546 INFO L87 Difference]: Start difference. First operand 2287 states and 6126 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:14:54,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:54,442 INFO L93 Difference]: Finished difference Result 3880 states and 9490 transitions. [2020-11-11 15:14:54,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-11 15:14:54,444 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 116 [2020-11-11 15:14:54,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:54,448 INFO L225 Difference]: With dead ends: 3880 [2020-11-11 15:14:54,448 INFO L226 Difference]: Without dead ends: 3610 [2020-11-11 15:14:54,448 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=519, Invalid=1551, Unknown=0, NotChecked=0, Total=2070 [2020-11-11 15:14:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-11 15:14:54,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2337. [2020-11-11 15:14:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 2.6866438356164384) internal successors, (6276), 2336 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 15:14:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 6276 transitions. [2020-11-11 15:14:54,486 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 6276 transitions. Word has length 116 [2020-11-11 15:14:54,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:54,486 INFO L481 AbstractCegarLoop]: Abstraction has 2337 states and 6276 transitions. [2020-11-11 15:14:54,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:14:54,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 6276 transitions. [2020-11-11 15:14:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:54,488 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:54,488 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 15:14:54,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:54,689 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:54,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:54,690 INFO L82 PathProgramCache]: Analyzing trace with hash -951644341, now seen corresponding path program 153 times [2020-11-11 15:14:54,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:54,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537745028] [2020-11-11 15:14:54,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:55,213 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 15:14:55,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537745028] [2020-11-11 15:14:55,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041337105] [2020-11-11 15:14:55,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:14:55,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:14:55,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:55,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:55,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:55,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:55,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:55,377 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 15:14:55,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:55,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:14:55,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094810693] [2020-11-11 15:14:55,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:14:55,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:55,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:14:55,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:14:55,379 INFO L87 Difference]: Start difference. First operand 2337 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 15:14:56,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:56,535 INFO L93 Difference]: Finished difference Result 3880 states and 9540 transitions. [2020-11-11 15:14:56,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:14:56,536 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 15:14:56,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:56,540 INFO L225 Difference]: With dead ends: 3880 [2020-11-11 15:14:56,541 INFO L226 Difference]: Without dead ends: 3610 [2020-11-11 15:14:56,541 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=590, Invalid=1860, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:14:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-11 15:14:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2387. [2020-11-11 15:14:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 2.6932103939647947) internal successors, (6426), 2386 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 15:14:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 6426 transitions. [2020-11-11 15:14:56,576 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 6426 transitions. Word has length 116 [2020-11-11 15:14:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:56,576 INFO L481 AbstractCegarLoop]: Abstraction has 2387 states and 6426 transitions. [2020-11-11 15:14:56,576 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 15:14:56,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 6426 transitions. [2020-11-11 15:14:56,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:56,578 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:56,578 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 15:14:56,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-11-11 15:14:56,779 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:56,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:56,780 INFO L82 PathProgramCache]: Analyzing trace with hash -877342951, now seen corresponding path program 154 times [2020-11-11 15:14:56,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:56,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90145771] [2020-11-11 15:14:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:57,236 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 15:14:57,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90145771] [2020-11-11 15:14:57,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346989625] [2020-11-11 15:14:57,237 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 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 15:14:57,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:14:57,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:57,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:14:57,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:57,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:57,360 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 15:14:57,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:57,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:14:57,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273246585] [2020-11-11 15:14:57,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:14:57,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:57,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:14:57,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:14:57,361 INFO L87 Difference]: Start difference. First operand 2387 states and 6426 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:14:58,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:14:58,368 INFO L93 Difference]: Finished difference Result 3880 states and 9590 transitions. [2020-11-11 15:14:58,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:14:58,370 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 116 [2020-11-11 15:14:58,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:14:58,374 INFO L225 Difference]: With dead ends: 3880 [2020-11-11 15:14:58,374 INFO L226 Difference]: Without dead ends: 3610 [2020-11-11 15:14:58,375 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:14:58,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-11 15:14:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2437. [2020-11-11 15:14:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2436 states have (on average 2.6995073891625614) internal successors, (6576), 2436 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 15:14:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 6576 transitions. [2020-11-11 15:14:58,427 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 6576 transitions. Word has length 116 [2020-11-11 15:14:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:14:58,427 INFO L481 AbstractCegarLoop]: Abstraction has 2437 states and 6576 transitions. [2020-11-11 15:14:58,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:14:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 6576 transitions. [2020-11-11 15:14:58,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:14:58,430 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:14:58,430 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 15:14:58,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:14:58,631 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:14:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:14:58,632 INFO L82 PathProgramCache]: Analyzing trace with hash -241325047, now seen corresponding path program 155 times [2020-11-11 15:14:58,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:14:58,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268188247] [2020-11-11 15:14:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:14:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:14:59,114 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 15:14:59,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268188247] [2020-11-11 15:14:59,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484982306] [2020-11-11 15:14:59,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:14:59,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:14:59,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:14:59,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:14:59,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:14:59,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:14:59,259 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:14:59,275 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 15:14:59,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:14:59,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:14:59,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849135915] [2020-11-11 15:14:59,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:14:59,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:14:59,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:14:59,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:14:59,276 INFO L87 Difference]: Start difference. First operand 2437 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 15:15:00,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:00,567 INFO L93 Difference]: Finished difference Result 3880 states and 9640 transitions. [2020-11-11 15:15:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:15:00,568 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 15:15:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:00,573 INFO L225 Difference]: With dead ends: 3880 [2020-11-11 15:15:00,573 INFO L226 Difference]: Without dead ends: 3610 [2020-11-11 15:15:00,574 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=621, Invalid=2031, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:15:00,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-11 15:15:00,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2487. [2020-11-11 15:15:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 2.7055510860820595) internal successors, (6726), 2486 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 15:15:00,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 6726 transitions. [2020-11-11 15:15:00,610 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 6726 transitions. Word has length 116 [2020-11-11 15:15:00,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:00,610 INFO L481 AbstractCegarLoop]: Abstraction has 2487 states and 6726 transitions. [2020-11-11 15:15:00,610 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 15:15:00,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 6726 transitions. [2020-11-11 15:15:00,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:15:00,613 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:00,613 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 15:15:00,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-11-11 15:15:00,813 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:00,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:00,814 INFO L82 PathProgramCache]: Analyzing trace with hash -130796201, now seen corresponding path program 156 times [2020-11-11 15:15:00,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:00,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120972870] [2020-11-11 15:15:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:01,253 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 15:15:01,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120972870] [2020-11-11 15:15:01,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836902040] [2020-11-11 15:15:01,253 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 15:15:01,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:15:01,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:01,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:01,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:01,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:01,389 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 15:15:01,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:01,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:15:01,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587807543] [2020-11-11 15:15:01,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:01,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:01,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:01,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:01,390 INFO L87 Difference]: Start difference. First operand 2487 states and 6726 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:15:02,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:02,538 INFO L93 Difference]: Finished difference Result 3880 states and 9690 transitions. [2020-11-11 15:15:02,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:15:02,539 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 116 [2020-11-11 15:15:02,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:02,544 INFO L225 Difference]: With dead ends: 3880 [2020-11-11 15:15:02,545 INFO L226 Difference]: Without dead ends: 3610 [2020-11-11 15:15:02,545 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:15:02,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-11 15:15:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2537. [2020-11-11 15:15:02,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 2.7113564668769716) internal successors, (6876), 2536 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 15:15:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 6876 transitions. [2020-11-11 15:15:02,588 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 6876 transitions. Word has length 116 [2020-11-11 15:15:02,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:02,588 INFO L481 AbstractCegarLoop]: Abstraction has 2537 states and 6876 transitions. [2020-11-11 15:15:02,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:15:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 6876 transitions. [2020-11-11 15:15:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:15:02,590 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:02,590 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 15:15:02,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:02,791 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:02,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:02,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1932492359, now seen corresponding path program 157 times [2020-11-11 15:15:02,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:02,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037345464] [2020-11-11 15:15:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:03,258 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 15:15:03,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037345464] [2020-11-11 15:15:03,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246154051] [2020-11-11 15:15:03,259 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 15:15:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:03,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:03,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:03,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:03,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:03,415 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 15:15:03,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:03,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:15:03,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204220206] [2020-11-11 15:15:03,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:15:03,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:03,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:15:03,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:15:03,416 INFO L87 Difference]: Start difference. First operand 2537 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 15:15:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:04,858 INFO L93 Difference]: Finished difference Result 3880 states and 9740 transitions. [2020-11-11 15:15:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:15:04,858 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 15:15:04,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:04,863 INFO L225 Difference]: With dead ends: 3880 [2020-11-11 15:15:04,863 INFO L226 Difference]: Without dead ends: 3610 [2020-11-11 15:15:04,863 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:15:04,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-11 15:15:04,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2587. [2020-11-11 15:15:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2586 states have (on average 2.7169373549883993) internal successors, (7026), 2586 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 15:15:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 7026 transitions. [2020-11-11 15:15:04,901 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 7026 transitions. Word has length 116 [2020-11-11 15:15:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:04,902 INFO L481 AbstractCegarLoop]: Abstraction has 2587 states and 7026 transitions. [2020-11-11 15:15:04,902 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 15:15:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 7026 transitions. [2020-11-11 15:15:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:15:04,904 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:04,904 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 15:15:05,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-11-11 15:15:05,105 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:05,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:05,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1494528277, now seen corresponding path program 158 times [2020-11-11 15:15:05,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:05,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095843698] [2020-11-11 15:15:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:05,682 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 15:15:05,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095843698] [2020-11-11 15:15:05,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105034157] [2020-11-11 15:15:05,683 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 15:15:05,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:15:05,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:05,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:05,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:05,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:05,867 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 15:15:05,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:05,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:15:05,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479889928] [2020-11-11 15:15:05,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:05,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:05,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:05,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:05,869 INFO L87 Difference]: Start difference. First operand 2587 states and 7026 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:15:07,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:07,120 INFO L93 Difference]: Finished difference Result 3880 states and 9790 transitions. [2020-11-11 15:15:07,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:15:07,121 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 116 [2020-11-11 15:15:07,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:07,126 INFO L225 Difference]: With dead ends: 3880 [2020-11-11 15:15:07,126 INFO L226 Difference]: Without dead ends: 3610 [2020-11-11 15:15:07,127 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:15:07,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-11 15:15:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2637. [2020-11-11 15:15:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2636 states have (on average 2.7223065250379364) internal successors, (7176), 2636 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 15:15:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 7176 transitions. [2020-11-11 15:15:07,166 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 7176 transitions. Word has length 116 [2020-11-11 15:15:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:07,166 INFO L481 AbstractCegarLoop]: Abstraction has 2637 states and 7176 transitions. [2020-11-11 15:15:07,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:15:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 7176 transitions. [2020-11-11 15:15:07,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:15:07,168 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:07,168 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 15:15:07,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-11-11 15:15:07,369 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:07,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:07,370 INFO L82 PathProgramCache]: Analyzing trace with hash -50764283, now seen corresponding path program 159 times [2020-11-11 15:15:07,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:07,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815245520] [2020-11-11 15:15:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:07,815 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 15:15:07,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815245520] [2020-11-11 15:15:07,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541141516] [2020-11-11 15:15:07,816 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 15:15:07,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:15:07,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:07,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:07,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:07,951 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:07,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:07,987 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 15:15:07,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:07,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:15:07,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720156863] [2020-11-11 15:15:07,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:15:07,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:07,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:15:07,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:15:07,988 INFO L87 Difference]: Start difference. First operand 2637 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 15:15:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:09,591 INFO L93 Difference]: Finished difference Result 3880 states and 9840 transitions. [2020-11-11 15:15:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:15:09,592 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 15:15:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:09,597 INFO L225 Difference]: With dead ends: 3880 [2020-11-11 15:15:09,597 INFO L226 Difference]: Without dead ends: 3610 [2020-11-11 15:15:09,597 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=731, Invalid=2349, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:15:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-11 15:15:09,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2687. [2020-11-11 15:15:09,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 2.727475800446761) internal successors, (7326), 2686 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 15:15:09,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 7326 transitions. [2020-11-11 15:15:09,635 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 7326 transitions. Word has length 116 [2020-11-11 15:15:09,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:09,636 INFO L481 AbstractCegarLoop]: Abstraction has 2687 states and 7326 transitions. [2020-11-11 15:15:09,636 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 15:15:09,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 7326 transitions. [2020-11-11 15:15:09,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:15:09,638 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:09,638 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 15:15:09,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:09,839 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:09,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:09,839 INFO L82 PathProgramCache]: Analyzing trace with hash -617930157, now seen corresponding path program 160 times [2020-11-11 15:15:09,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:09,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761639024] [2020-11-11 15:15:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:10,259 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 15:15:10,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761639024] [2020-11-11 15:15:10,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444048406] [2020-11-11 15:15:10,260 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 15:15:10,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:10,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:10,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:15:10,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:10,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:10,400 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 15:15:10,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:10,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:15:10,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253450451] [2020-11-11 15:15:10,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:10,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:10,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:10,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:10,402 INFO L87 Difference]: Start difference. First operand 2687 states and 7326 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:15:11,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:11,729 INFO L93 Difference]: Finished difference Result 3880 states and 9890 transitions. [2020-11-11 15:15:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:15:11,730 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 116 [2020-11-11 15:15:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:11,735 INFO L225 Difference]: With dead ends: 3880 [2020-11-11 15:15:11,735 INFO L226 Difference]: Without dead ends: 3610 [2020-11-11 15:15:11,735 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=707, Invalid=2155, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:15:11,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-11 15:15:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2737. [2020-11-11 15:15:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2736 states have (on average 2.732456140350877) internal successors, (7476), 2736 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 15:15:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 7476 transitions. [2020-11-11 15:15:11,776 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 7476 transitions. Word has length 116 [2020-11-11 15:15:11,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:11,777 INFO L481 AbstractCegarLoop]: Abstraction has 2737 states and 7476 transitions. [2020-11-11 15:15:11,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:15:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 7476 transitions. [2020-11-11 15:15:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:15:11,779 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:11,779 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 15:15:11,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:11,980 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash 210780995, now seen corresponding path program 161 times [2020-11-11 15:15:11,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:11,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868588464] [2020-11-11 15:15:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:12,468 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 15:15:12,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868588464] [2020-11-11 15:15:12,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210651650] [2020-11-11 15:15:12,468 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 15:15:12,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:15:12,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:12,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:12,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:12,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:12,640 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 15:15:12,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:12,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:15:12,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884398693] [2020-11-11 15:15:12,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:15:12,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:12,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:15:12,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:15:12,641 INFO L87 Difference]: Start difference. First operand 2737 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 15:15:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:14,397 INFO L93 Difference]: Finished difference Result 3880 states and 9940 transitions. [2020-11-11 15:15:14,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:15:14,398 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 15:15:14,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:14,403 INFO L225 Difference]: With dead ends: 3880 [2020-11-11 15:15:14,403 INFO L226 Difference]: Without dead ends: 3610 [2020-11-11 15:15:14,404 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=810, Invalid=2496, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:15:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-11 15:15:14,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2787. [2020-11-11 15:15:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 2.7372577171572146) internal successors, (7626), 2786 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 15:15:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 7626 transitions. [2020-11-11 15:15:14,446 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 7626 transitions. Word has length 116 [2020-11-11 15:15:14,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:14,446 INFO L481 AbstractCegarLoop]: Abstraction has 2787 states and 7626 transitions. [2020-11-11 15:15:14,446 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 15:15:14,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 7626 transitions. [2020-11-11 15:15:14,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:15:14,448 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:14,448 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 15:15:14,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-11-11 15:15:14,663 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:14,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:14,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1511757551, now seen corresponding path program 162 times [2020-11-11 15:15:14,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:14,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126863251] [2020-11-11 15:15:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:15,084 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 15:15:15,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126863251] [2020-11-11 15:15:15,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52022381] [2020-11-11 15:15:15,085 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 15:15:15,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:15:15,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:15,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:15,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:15,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:15,220 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 15:15:15,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:15,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:15:15,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81869815] [2020-11-11 15:15:15,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:15,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:15,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:15,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:15,221 INFO L87 Difference]: Start difference. First operand 2787 states and 7626 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:15:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:16,637 INFO L93 Difference]: Finished difference Result 3880 states and 9990 transitions. [2020-11-11 15:15:16,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:15:16,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 116 [2020-11-11 15:15:16,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:16,643 INFO L225 Difference]: With dead ends: 3880 [2020-11-11 15:15:16,643 INFO L226 Difference]: Without dead ends: 3610 [2020-11-11 15:15:16,643 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:15:16,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-11 15:15:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2837. [2020-11-11 15:15:16,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2836 states have (on average 2.741889985895628) internal successors, (7776), 2836 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 15:15:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 7776 transitions. [2020-11-11 15:15:16,688 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 7776 transitions. Word has length 116 [2020-11-11 15:15:16,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:16,688 INFO L481 AbstractCegarLoop]: Abstraction has 2837 states and 7776 transitions. [2020-11-11 15:15:16,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:15:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 7776 transitions. [2020-11-11 15:15:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:15:16,691 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:16,691 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 15:15:16,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:16,892 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:16,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:16,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1243674113, now seen corresponding path program 163 times [2020-11-11 15:15:16,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:16,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478543312] [2020-11-11 15:15:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:17,358 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 15:15:17,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478543312] [2020-11-11 15:15:17,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862608331] [2020-11-11 15:15:17,358 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 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 15:15:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:17,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:17,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:17,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:17,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:17,517 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 15:15:17,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:17,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:15:17,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623917091] [2020-11-11 15:15:17,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:15:17,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:17,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:15:17,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:15:17,518 INFO L87 Difference]: Start difference. First operand 2837 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 15:15:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:19,387 INFO L93 Difference]: Finished difference Result 3880 states and 10040 transitions. [2020-11-11 15:15:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:15:19,388 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 15:15:19,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:19,392 INFO L225 Difference]: With dead ends: 3880 [2020-11-11 15:15:19,393 INFO L226 Difference]: Without dead ends: 3610 [2020-11-11 15:15:19,393 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:15:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2020-11-11 15:15:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2887. [2020-11-11 15:15:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2886 states have (on average 2.7463617463617465) internal successors, (7926), 2886 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 15:15:19,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 7926 transitions. [2020-11-11 15:15:19,435 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 7926 transitions. Word has length 116 [2020-11-11 15:15:19,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:19,435 INFO L481 AbstractCegarLoop]: Abstraction has 2887 states and 7926 transitions. [2020-11-11 15:15:19,435 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 15:15:19,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 7926 transitions. [2020-11-11 15:15:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:15:19,438 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:19,438 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 15:15:19,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:19,638 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:19,639 INFO L82 PathProgramCache]: Analyzing trace with hash -112892593, now seen corresponding path program 164 times [2020-11-11 15:15:19,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:19,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237328534] [2020-11-11 15:15:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:20,143 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 15:15:20,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237328534] [2020-11-11 15:15:20,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455159616] [2020-11-11 15:15:20,143 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 15:15:20,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:15:20,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:20,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:20,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:20,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:20,281 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 15:15:20,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:20,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:15:20,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460735740] [2020-11-11 15:15:20,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:20,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:20,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:20,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:20,283 INFO L87 Difference]: Start difference. First operand 2887 states and 7926 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:15:21,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:21,861 INFO L93 Difference]: Finished difference Result 3910 states and 10165 transitions. [2020-11-11 15:15:21,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:15:21,862 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 116 [2020-11-11 15:15:21,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:21,868 INFO L225 Difference]: With dead ends: 3910 [2020-11-11 15:15:21,868 INFO L226 Difference]: Without dead ends: 3640 [2020-11-11 15:15:21,868 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:15:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3640 states. [2020-11-11 15:15:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3640 to 2937. [2020-11-11 15:15:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2937 states, 2936 states have (on average 2.7540871934604905) internal successors, (8086), 2936 states have internal predecessors, (8086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2937 states to 2937 states and 8086 transitions. [2020-11-11 15:15:21,932 INFO L78 Accepts]: Start accepts. Automaton has 2937 states and 8086 transitions. Word has length 116 [2020-11-11 15:15:21,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:21,932 INFO L481 AbstractCegarLoop]: Abstraction has 2937 states and 8086 transitions. [2020-11-11 15:15:21,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:15:21,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2937 states and 8086 transitions. [2020-11-11 15:15:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:15:21,936 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:21,936 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 15:15:22,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:22,150 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:22,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1718640191, now seen corresponding path program 165 times [2020-11-11 15:15:22,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:22,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546480612] [2020-11-11 15:15:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:22,575 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 15:15:22,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546480612] [2020-11-11 15:15:22,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071430259] [2020-11-11 15:15:22,576 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 15:15:22,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:15:22,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:22,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:22,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:22,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:22,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:22,749 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 15:15:22,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:22,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:15:22,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166419476] [2020-11-11 15:15:22,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:15:22,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:22,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:15:22,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:15:22,750 INFO L87 Difference]: Start difference. First operand 2937 states and 8086 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 15:15:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:25,002 INFO L93 Difference]: Finished difference Result 4369 states and 11434 transitions. [2020-11-11 15:15:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:15:25,004 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 15:15:25,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:25,009 INFO L225 Difference]: With dead ends: 4369 [2020-11-11 15:15:25,009 INFO L226 Difference]: Without dead ends: 3800 [2020-11-11 15:15:25,009 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1037, Invalid=2995, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:15:25,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3800 states. [2020-11-11 15:15:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3800 to 2987. [2020-11-11 15:15:25,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2987 states, 2986 states have (on average 2.7598794373744138) internal successors, (8241), 2986 states have internal predecessors, (8241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2987 states to 2987 states and 8241 transitions. [2020-11-11 15:15:25,050 INFO L78 Accepts]: Start accepts. Automaton has 2987 states and 8241 transitions. Word has length 116 [2020-11-11 15:15:25,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:25,050 INFO L481 AbstractCegarLoop]: Abstraction has 2987 states and 8241 transitions. [2020-11-11 15:15:25,050 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 15:15:25,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2987 states and 8241 transitions. [2020-11-11 15:15:25,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:15:25,053 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:25,053 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 15:15:25,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2020-11-11 15:15:25,254 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:25,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:25,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1947535603, now seen corresponding path program 166 times [2020-11-11 15:15:25,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:25,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563390220] [2020-11-11 15:15:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:25,669 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 15:15:25,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563390220] [2020-11-11 15:15:25,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947974438] [2020-11-11 15:15:25,670 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 15:15:25,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:25,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:25,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:15:25,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:25,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:25,798 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 15:15:25,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:25,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-11-11 15:15:25,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827980936] [2020-11-11 15:15:25,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:15:25,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:25,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:15:25,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-11-11 15:15:25,800 INFO L87 Difference]: Start difference. First operand 2987 states and 8241 transitions. Second operand has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:15:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:27,428 INFO L93 Difference]: Finished difference Result 5012 states and 13394 transitions. [2020-11-11 15:15:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:15:27,429 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 116 [2020-11-11 15:15:27,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:27,435 INFO L225 Difference]: With dead ends: 5012 [2020-11-11 15:15:27,435 INFO L226 Difference]: Without dead ends: 4742 [2020-11-11 15:15:27,435 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1017, Invalid=2523, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:15:27,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2020-11-11 15:15:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 3112. [2020-11-11 15:15:27,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3112 states, 3111 states have (on average 2.7746705239472838) internal successors, (8632), 3111 states have internal predecessors, (8632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:15:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3112 states to 3112 states and 8632 transitions. [2020-11-11 15:15:27,482 INFO L78 Accepts]: Start accepts. Automaton has 3112 states and 8632 transitions. Word has length 116 [2020-11-11 15:15:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:27,482 INFO L481 AbstractCegarLoop]: Abstraction has 3112 states and 8632 transitions. [2020-11-11 15:15:27,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.043478260869565) internal successors, (116), 23 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 15:15:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3112 states and 8632 transitions. [2020-11-11 15:15:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-11-11 15:15:27,485 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:27,485 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 15:15:27,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:27,687 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:27,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:27,687 INFO L82 PathProgramCache]: Analyzing trace with hash -236327649, now seen corresponding path program 167 times [2020-11-11 15:15:27,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:27,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465845740] [2020-11-11 15:15:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:28,107 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 15:15:28,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465845740] [2020-11-11 15:15:28,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830511043] [2020-11-11 15:15:28,107 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 15:15:28,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:15:28,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:28,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 15:15:28,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:28,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:28,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:28,295 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 15:15:28,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:28,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-11 15:15:28,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37931342] [2020-11-11 15:15:28,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 15:15:28,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:28,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 15:15:28,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-11-11 15:15:28,297 INFO L87 Difference]: Start difference. First operand 3112 states and 8632 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 15:15:30,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:30,364 INFO L93 Difference]: Finished difference Result 4051 states and 10750 transitions. [2020-11-11 15:15:30,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:15:30,365 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 15:15:30,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:30,370 INFO L225 Difference]: With dead ends: 4051 [2020-11-11 15:15:30,370 INFO L226 Difference]: Without dead ends: 3580 [2020-11-11 15:15:30,371 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1146, Invalid=2886, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:15:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2020-11-11 15:15:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 2202. [2020-11-11 15:15:30,401 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 15:15:30,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 5926 transitions. [2020-11-11 15:15:30,405 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 5926 transitions. Word has length 116 [2020-11-11 15:15:30,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:30,405 INFO L481 AbstractCegarLoop]: Abstraction has 2202 states and 5926 transitions. [2020-11-11 15:15:30,405 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 15:15:30,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 5926 transitions. [2020-11-11 15:15:30,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:30,407 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:30,407 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 15:15:30,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-11-11 15:15:30,608 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:30,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:30,608 INFO L82 PathProgramCache]: Analyzing trace with hash 392291254, now seen corresponding path program 168 times [2020-11-11 15:15:30,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:30,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86851974] [2020-11-11 15:15:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:31,195 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 15:15:31,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86851974] [2020-11-11 15:15:31,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918187843] [2020-11-11 15:15:31,196 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 15:15:31,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:15:31,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:31,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:31,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:31,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:31,364 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 15:15:31,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:31,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:15:31,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614347514] [2020-11-11 15:15:31,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:15:31,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:31,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:15:31,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:15:31,365 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 15:15:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:32,390 INFO L93 Difference]: Finished difference Result 3495 states and 8690 transitions. [2020-11-11 15:15:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 15:15:32,392 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 15:15:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:32,396 INFO L225 Difference]: With dead ends: 3495 [2020-11-11 15:15:32,397 INFO L226 Difference]: Without dead ends: 3225 [2020-11-11 15:15:32,397 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 15:15:32,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2020-11-11 15:15:32,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2252. [2020-11-11 15:15:32,428 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 15:15:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 6076 transitions. [2020-11-11 15:15:32,432 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 6076 transitions. Word has length 121 [2020-11-11 15:15:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:32,432 INFO L481 AbstractCegarLoop]: Abstraction has 2252 states and 6076 transitions. [2020-11-11 15:15:32,432 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 15:15:32,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 6076 transitions. [2020-11-11 15:15:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:32,434 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:32,434 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 15:15:32,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-11-11 15:15:32,635 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:32,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2074798246, now seen corresponding path program 169 times [2020-11-11 15:15:32,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:32,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774766483] [2020-11-11 15:15:32,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:33,272 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 15:15:33,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774766483] [2020-11-11 15:15:33,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135491213] [2020-11-11 15:15:33,273 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 15:15:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:33,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:33,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:33,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:33,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:33,497 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 15:15:33,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:33,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:15:33,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927631797] [2020-11-11 15:15:33,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:15:33,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:33,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:15:33,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:15:33,498 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 15:15:34,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:34,780 INFO L93 Difference]: Finished difference Result 3940 states and 9630 transitions. [2020-11-11 15:15:34,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:15:34,782 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 15:15:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:34,787 INFO L225 Difference]: With dead ends: 3940 [2020-11-11 15:15:34,787 INFO L226 Difference]: Without dead ends: 3670 [2020-11-11 15:15:34,787 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=665, Invalid=1987, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:15:34,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2020-11-11 15:15:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2302. [2020-11-11 15:15:34,817 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 15:15:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 6226 transitions. [2020-11-11 15:15:34,821 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 6226 transitions. Word has length 121 [2020-11-11 15:15:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:34,821 INFO L481 AbstractCegarLoop]: Abstraction has 2302 states and 6226 transitions. [2020-11-11 15:15:34,821 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 15:15:34,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 6226 transitions. [2020-11-11 15:15:34,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:34,823 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:34,823 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 15:15:35,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:35,024 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:35,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:35,025 INFO L82 PathProgramCache]: Analyzing trace with hash 222150388, now seen corresponding path program 170 times [2020-11-11 15:15:35,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:35,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140233956] [2020-11-11 15:15:35,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:35,598 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 15:15:35,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140233956] [2020-11-11 15:15:35,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462446229] [2020-11-11 15:15:35,599 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 15:15:35,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:15:35,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:35,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:35,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:35,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:35,784 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 15:15:35,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:35,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:15:35,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726261221] [2020-11-11 15:15:35,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:15:35,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:35,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:15:35,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:15:35,785 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 15:15:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:36,973 INFO L93 Difference]: Finished difference Result 3945 states and 9690 transitions. [2020-11-11 15:15:36,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:15:36,974 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 15:15:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:36,980 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:36,980 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:36,981 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=663, Invalid=1989, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:15:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:37,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2352. [2020-11-11 15:15:37,012 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 15:15:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6376 transitions. [2020-11-11 15:15:37,016 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6376 transitions. Word has length 121 [2020-11-11 15:15:37,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:37,017 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 6376 transitions. [2020-11-11 15:15:37,017 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 15:15:37,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6376 transitions. [2020-11-11 15:15:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:37,019 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:37,019 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 15:15:37,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-11-11 15:15:37,219 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:37,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:37,220 INFO L82 PathProgramCache]: Analyzing trace with hash 288042980, now seen corresponding path program 171 times [2020-11-11 15:15:37,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:37,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168935982] [2020-11-11 15:15:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:37,787 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 15:15:37,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168935982] [2020-11-11 15:15:37,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099257850] [2020-11-11 15:15:37,787 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 15:15:37,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:15:37,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:37,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:37,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:37,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:38,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:38,029 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 15:15:38,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:38,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:15:38,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693343373] [2020-11-11 15:15:38,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:15:38,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:38,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:15:38,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:15:38,031 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 15:15:39,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:39,450 INFO L93 Difference]: Finished difference Result 3945 states and 9740 transitions. [2020-11-11 15:15:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:15:39,451 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 15:15:39,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:39,456 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:39,457 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:39,457 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=686, Invalid=2176, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:15:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2402. [2020-11-11 15:15:39,490 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 15:15:39,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6526 transitions. [2020-11-11 15:15:39,494 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6526 transitions. Word has length 121 [2020-11-11 15:15:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:39,494 INFO L481 AbstractCegarLoop]: Abstraction has 2402 states and 6526 transitions. [2020-11-11 15:15:39,494 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 15:15:39,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6526 transitions. [2020-11-11 15:15:39,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:39,497 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:39,497 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 15:15:39,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:39,697 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:39,698 INFO L82 PathProgramCache]: Analyzing trace with hash 362344370, now seen corresponding path program 172 times [2020-11-11 15:15:39,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:39,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079200636] [2020-11-11 15:15:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:40,262 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 15:15:40,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079200636] [2020-11-11 15:15:40,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567050103] [2020-11-11 15:15:40,262 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 15:15:40,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:40,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:40,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:15:40,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:40,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:40,436 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 15:15:40,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:40,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:15:40,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386040262] [2020-11-11 15:15:40,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:15:40,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:40,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:15:40,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:15:40,437 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 15:15:41,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:41,721 INFO L93 Difference]: Finished difference Result 3945 states and 9790 transitions. [2020-11-11 15:15:41,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:15:41,722 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 15:15:41,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:41,727 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:41,727 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:41,728 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=698, Invalid=2164, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:15:41,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2452. [2020-11-11 15:15:41,759 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 15:15:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 6676 transitions. [2020-11-11 15:15:41,763 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 6676 transitions. Word has length 121 [2020-11-11 15:15:41,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:41,764 INFO L481 AbstractCegarLoop]: Abstraction has 2452 states and 6676 transitions. [2020-11-11 15:15:41,764 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 15:15:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 6676 transitions. [2020-11-11 15:15:41,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:41,766 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:41,767 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 15:15:41,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2020-11-11 15:15:41,967 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:41,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:41,968 INFO L82 PathProgramCache]: Analyzing trace with hash 998362274, now seen corresponding path program 173 times [2020-11-11 15:15:41,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:41,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021487562] [2020-11-11 15:15:41,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:42,537 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 15:15:42,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021487562] [2020-11-11 15:15:42,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511025841] [2020-11-11 15:15:42,537 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 15:15:42,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:15:42,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:42,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:42,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:42,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:42,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:42,756 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 15:15:42,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:42,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:15:42,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616674813] [2020-11-11 15:15:42,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:15:42,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:42,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:15:42,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:15:42,757 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 15:15:44,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:44,295 INFO L93 Difference]: Finished difference Result 3945 states and 9840 transitions. [2020-11-11 15:15:44,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:15:44,296 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 15:15:44,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:44,301 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:44,301 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:44,302 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:15:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2502. [2020-11-11 15:15:44,335 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 15:15:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 6826 transitions. [2020-11-11 15:15:44,340 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 6826 transitions. Word has length 121 [2020-11-11 15:15:44,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:44,340 INFO L481 AbstractCegarLoop]: Abstraction has 2502 states and 6826 transitions. [2020-11-11 15:15:44,340 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 15:15:44,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 6826 transitions. [2020-11-11 15:15:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:44,342 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:44,342 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 15:15:44,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:44,543 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:44,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:44,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1108891120, now seen corresponding path program 174 times [2020-11-11 15:15:44,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:44,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790046736] [2020-11-11 15:15:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:45,069 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 15:15:45,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790046736] [2020-11-11 15:15:45,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545074396] [2020-11-11 15:15:45,070 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 15:15:45,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:15:45,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:45,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:45,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:45,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:45,267 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 15:15:45,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:45,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:15:45,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166361206] [2020-11-11 15:15:45,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:15:45,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:45,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:15:45,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:15:45,268 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 15:15:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:46,628 INFO L93 Difference]: Finished difference Result 3945 states and 9890 transitions. [2020-11-11 15:15:46,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:15:46,629 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 15:15:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:46,634 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:46,634 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:46,635 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:15:46,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:46,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2552. [2020-11-11 15:15:46,669 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 15:15:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6976 transitions. [2020-11-11 15:15:46,673 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6976 transitions. Word has length 121 [2020-11-11 15:15:46,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:46,674 INFO L481 AbstractCegarLoop]: Abstraction has 2552 states and 6976 transitions. [2020-11-11 15:15:46,674 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 15:15:46,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6976 transitions. [2020-11-11 15:15:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:46,676 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:46,676 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 15:15:46,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:46,877 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:46,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:46,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1122787616, now seen corresponding path program 175 times [2020-11-11 15:15:46,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:46,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127828347] [2020-11-11 15:15:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:47,437 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 15:15:47,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127828347] [2020-11-11 15:15:47,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261786008] [2020-11-11 15:15:47,438 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 15:15:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:47,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:47,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:47,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:47,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:47,651 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 15:15:47,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:47,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:15:47,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932278963] [2020-11-11 15:15:47,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:15:47,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:47,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:15:47,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:15:47,655 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 15:15:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:49,352 INFO L93 Difference]: Finished difference Result 3945 states and 9940 transitions. [2020-11-11 15:15:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:15:49,354 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 15:15:49,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:49,358 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:49,359 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:49,359 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=776, Invalid=2530, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:15:49,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2602. [2020-11-11 15:15:49,391 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 15:15:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2602 states to 2602 states and 7126 transitions. [2020-11-11 15:15:49,396 INFO L78 Accepts]: Start accepts. Automaton has 2602 states and 7126 transitions. Word has length 121 [2020-11-11 15:15:49,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:49,396 INFO L481 AbstractCegarLoop]: Abstraction has 2602 states and 7126 transitions. [2020-11-11 15:15:49,396 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 15:15:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2602 states and 7126 transitions. [2020-11-11 15:15:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:49,398 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:49,398 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 15:15:49,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:49,599 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:49,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1560751698, now seen corresponding path program 176 times [2020-11-11 15:15:49,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:49,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667056944] [2020-11-11 15:15:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:50,098 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 15:15:50,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667056944] [2020-11-11 15:15:50,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728551299] [2020-11-11 15:15:50,099 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 15:15:50,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:15:50,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:50,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:50,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:50,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:50,273 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 15:15:50,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:50,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:15:50,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626563031] [2020-11-11 15:15:50,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:15:50,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:50,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:15:50,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:15:50,275 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 15:15:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:51,763 INFO L93 Difference]: Finished difference Result 3945 states and 9990 transitions. [2020-11-11 15:15:51,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:15:51,764 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 15:15:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:51,769 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:51,770 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:51,770 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=816, Invalid=2490, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:15:51,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2652. [2020-11-11 15:15:51,805 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 15:15:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 7276 transitions. [2020-11-11 15:15:51,809 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 7276 transitions. Word has length 121 [2020-11-11 15:15:51,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:51,809 INFO L481 AbstractCegarLoop]: Abstraction has 2652 states and 7276 transitions. [2020-11-11 15:15:51,810 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 15:15:51,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 7276 transitions. [2020-11-11 15:15:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:51,812 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:51,812 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 15:15:52,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:15:52,013 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:52,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1188923038, now seen corresponding path program 177 times [2020-11-11 15:15:52,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:52,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678707850] [2020-11-11 15:15:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:52,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:52,582 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 15:15:52,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678707850] [2020-11-11 15:15:52,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555862799] [2020-11-11 15:15:52,582 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 15:15:52,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:15:52,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:52,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:52,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:52,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:52,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:52,811 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 15:15:52,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:52,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:15:52,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879250879] [2020-11-11 15:15:52,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:15:52,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:52,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:15:52,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:15:52,812 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 15:15:54,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:54,566 INFO L93 Difference]: Finished difference Result 3945 states and 10040 transitions. [2020-11-11 15:15:54,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:15:54,567 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 15:15:54,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:54,572 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:54,572 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:54,573 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=845, Invalid=2695, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:15:54,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:54,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2702. [2020-11-11 15:15:54,605 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 15:15:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2702 states to 2702 states and 7426 transitions. [2020-11-11 15:15:54,609 INFO L78 Accepts]: Start accepts. Automaton has 2702 states and 7426 transitions. Word has length 121 [2020-11-11 15:15:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:54,609 INFO L481 AbstractCegarLoop]: Abstraction has 2702 states and 7426 transitions. [2020-11-11 15:15:54,609 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 15:15:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2702 states and 7426 transitions. [2020-11-11 15:15:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:54,611 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:54,611 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 15:15:54,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-11-11 15:15:54,812 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:54,813 INFO L82 PathProgramCache]: Analyzing trace with hash 621757164, now seen corresponding path program 178 times [2020-11-11 15:15:54,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:54,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971282379] [2020-11-11 15:15:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:55,298 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 15:15:55,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971282379] [2020-11-11 15:15:55,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570880334] [2020-11-11 15:15:55,299 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 15:15:55,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:15:55,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:55,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:15:55,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:55,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:55,472 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 15:15:55,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:55,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:15:55,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11750582] [2020-11-11 15:15:55,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:15:55,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:55,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:15:55,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:15:55,474 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 15:15:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:15:57,003 INFO L93 Difference]: Finished difference Result 3945 states and 10090 transitions. [2020-11-11 15:15:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:15:57,004 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 15:15:57,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:15:57,009 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:15:57,009 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:15:57,009 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:15:57,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:15:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2752. [2020-11-11 15:15:57,043 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 15:15:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 7576 transitions. [2020-11-11 15:15:57,048 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 7576 transitions. Word has length 121 [2020-11-11 15:15:57,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:15:57,048 INFO L481 AbstractCegarLoop]: Abstraction has 2752 states and 7576 transitions. [2020-11-11 15:15:57,048 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 15:15:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 7576 transitions. [2020-11-11 15:15:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:15:57,050 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:15:57,051 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 15:15:57,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-11-11 15:15:57,251 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:15:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:15:57,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1450468316, now seen corresponding path program 179 times [2020-11-11 15:15:57,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:15:57,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25526197] [2020-11-11 15:15:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:15:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:15:57,769 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 15:15:57,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25526197] [2020-11-11 15:15:57,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329855615] [2020-11-11 15:15:57,770 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 15:15:57,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:15:57,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:15:57,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:15:57,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:15:57,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:15:57,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:15:57,983 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 15:15:57,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:15:57,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:15:57,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395523093] [2020-11-11 15:15:57,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:15:57,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:15:57,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:15:57,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:15:57,984 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 15:16:00,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:00,017 INFO L93 Difference]: Finished difference Result 3945 states and 10140 transitions. [2020-11-11 15:16:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:16:00,018 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 15:16:00,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:00,023 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:16:00,023 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:16:00,024 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:16:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:16:00,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2802. [2020-11-11 15:16:00,081 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 15:16:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 7726 transitions. [2020-11-11 15:16:00,086 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 7726 transitions. Word has length 121 [2020-11-11 15:16:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:00,086 INFO L481 AbstractCegarLoop]: Abstraction has 2802 states and 7726 transitions. [2020-11-11 15:16:00,086 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 15:16:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 7726 transitions. [2020-11-11 15:16:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:16:00,089 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:00,089 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 15:16:00,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-11-11 15:16:00,297 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:00,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:00,297 INFO L82 PathProgramCache]: Analyzing trace with hash -272070230, now seen corresponding path program 180 times [2020-11-11 15:16:00,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:00,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176514085] [2020-11-11 15:16:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:00,811 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 15:16:00,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176514085] [2020-11-11 15:16:00,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175884104] [2020-11-11 15:16:00,813 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 15:16:00,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 15:16:00,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:00,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:16:00,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:00,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:01,013 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 15:16:01,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:01,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:16:01,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60786037] [2020-11-11 15:16:01,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:01,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:01,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:01,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:01,015 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 15:16:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:02,782 INFO L93 Difference]: Finished difference Result 3945 states and 10190 transitions. [2020-11-11 15:16:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:16:02,783 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 15:16:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:02,788 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:16:02,788 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:16:02,789 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=998, Invalid=2784, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:16:02,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:16:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2852. [2020-11-11 15:16:02,829 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 15:16:02,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 7876 transitions. [2020-11-11 15:16:02,835 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 7876 transitions. Word has length 121 [2020-11-11 15:16:02,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:02,835 INFO L481 AbstractCegarLoop]: Abstraction has 2852 states and 7876 transitions. [2020-11-11 15:16:02,835 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 15:16:02,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 7876 transitions. [2020-11-11 15:16:02,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:16:02,839 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:02,839 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 15:16:03,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:03,040 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:03,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:03,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1811605862, now seen corresponding path program 181 times [2020-11-11 15:16:03,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:03,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806061761] [2020-11-11 15:16:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:03,559 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 15:16:03,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806061761] [2020-11-11 15:16:03,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659392045] [2020-11-11 15:16:03,560 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 15:16:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:03,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:16:03,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:03,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:03,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:03,804 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 15:16:03,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:03,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:16:03,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645250022] [2020-11-11 15:16:03,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:16:03,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:03,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:16:03,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:16:03,806 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 15:16:06,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:06,028 INFO L93 Difference]: Finished difference Result 3945 states and 10240 transitions. [2020-11-11 15:16:06,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:16:06,030 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 15:16:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:06,035 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:16:06,035 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:16:06,036 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1031, Invalid=3001, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:16:06,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:16:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2902. [2020-11-11 15:16:06,075 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 15:16:06,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 8026 transitions. [2020-11-11 15:16:06,081 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 8026 transitions. Word has length 121 [2020-11-11 15:16:06,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:06,081 INFO L481 AbstractCegarLoop]: Abstraction has 2902 states and 8026 transitions. [2020-11-11 15:16:06,081 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 15:16:06,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 8026 transitions. [2020-11-11 15:16:06,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:16:06,084 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:06,084 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 15:16:06,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:06,284 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:06,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:06,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1126794728, now seen corresponding path program 182 times [2020-11-11 15:16:06,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:06,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879957288] [2020-11-11 15:16:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:06,813 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 15:16:06,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879957288] [2020-11-11 15:16:06,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70360223] [2020-11-11 15:16:06,814 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 15:16:06,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:16:06,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:06,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:16:06,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:06,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:06,991 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 15:16:06,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:06,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:16:06,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203915552] [2020-11-11 15:16:06,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:06,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:06,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:06,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:06,993 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 15:16:08,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:08,899 INFO L93 Difference]: Finished difference Result 3945 states and 10290 transitions. [2020-11-11 15:16:08,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:16:08,900 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 15:16:08,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:08,905 INFO L225 Difference]: With dead ends: 3945 [2020-11-11 15:16:08,905 INFO L226 Difference]: Without dead ends: 3675 [2020-11-11 15:16:08,905 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1113, Invalid=2919, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:16:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-11-11 15:16:08,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2952. [2020-11-11 15:16:08,945 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 15:16:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 8176 transitions. [2020-11-11 15:16:08,951 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 8176 transitions. Word has length 121 [2020-11-11 15:16:08,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:08,951 INFO L481 AbstractCegarLoop]: Abstraction has 2952 states and 8176 transitions. [2020-11-11 15:16:08,951 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 15:16:08,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 8176 transitions. [2020-11-11 15:16:08,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:16:08,954 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:08,954 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 15:16:09,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-11-11 15:16:09,155 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:09,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:09,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1336639784, now seen corresponding path program 183 times [2020-11-11 15:16:09,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:09,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853301238] [2020-11-11 15:16:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:09,665 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 15:16:09,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853301238] [2020-11-11 15:16:09,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613769355] [2020-11-11 15:16:09,666 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 15:16:09,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 15:16:09,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:09,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:16:09,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:09,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:09,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:09,904 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 15:16:09,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:09,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:16:09,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299591876] [2020-11-11 15:16:09,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:16:09,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:09,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:16:09,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:16:09,905 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 15:16:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:12,337 INFO L93 Difference]: Finished difference Result 3990 states and 10460 transitions. [2020-11-11 15:16:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:16:12,338 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 15:16:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:12,342 INFO L225 Difference]: With dead ends: 3990 [2020-11-11 15:16:12,342 INFO L226 Difference]: Without dead ends: 3720 [2020-11-11 15:16:12,343 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1148, Invalid=3142, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:16:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2020-11-11 15:16:12,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 3002. [2020-11-11 15:16:12,382 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 15:16:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 8341 transitions. [2020-11-11 15:16:12,388 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 8341 transitions. Word has length 121 [2020-11-11 15:16:12,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:12,388 INFO L481 AbstractCegarLoop]: Abstraction has 3002 states and 8341 transitions. [2020-11-11 15:16:12,388 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 15:16:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 8341 transitions. [2020-11-11 15:16:12,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:16:12,391 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:12,391 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 15:16:12,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:12,592 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:12,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:12,592 INFO L82 PathProgramCache]: Analyzing trace with hash -707848282, now seen corresponding path program 184 times [2020-11-11 15:16:12,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:12,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611208320] [2020-11-11 15:16:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:13,101 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 15:16:13,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611208320] [2020-11-11 15:16:13,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423673523] [2020-11-11 15:16:13,103 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 15:16:13,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:16:13,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:13,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:16:13,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:13,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:13,284 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 15:16:13,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:13,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-11 15:16:13,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741512448] [2020-11-11 15:16:13,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:13,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:13,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:13,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:13,286 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 15:16:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:15,310 INFO L93 Difference]: Finished difference Result 5052 states and 13544 transitions. [2020-11-11 15:16:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:16:15,311 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 15:16:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:15,318 INFO L225 Difference]: With dead ends: 5052 [2020-11-11 15:16:15,318 INFO L226 Difference]: Without dead ends: 4782 [2020-11-11 15:16:15,318 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1245, Invalid=3045, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:16:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4782 states. [2020-11-11 15:16:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4782 to 3127. [2020-11-11 15:16:15,363 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 15:16:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3127 states to 3127 states and 8732 transitions. [2020-11-11 15:16:15,369 INFO L78 Accepts]: Start accepts. Automaton has 3127 states and 8732 transitions. Word has length 121 [2020-11-11 15:16:15,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:15,369 INFO L481 AbstractCegarLoop]: Abstraction has 3127 states and 8732 transitions. [2020-11-11 15:16:15,370 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 15:16:15,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3127 states and 8732 transitions. [2020-11-11 15:16:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-11 15:16:15,372 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:15,372 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 15:16:15,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:15,573 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1003359672, now seen corresponding path program 185 times [2020-11-11 15:16:15,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:15,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154579787] [2020-11-11 15:16:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:16,127 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 15:16:16,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154579787] [2020-11-11 15:16:16,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474958607] [2020-11-11 15:16:16,128 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 15:16:16,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 15:16:16,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:16,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-11 15:16:16,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:16,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:16,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:16,330 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 15:16:16,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:16,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-11-11 15:16:16,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279424153] [2020-11-11 15:16:16,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:16:16,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:16,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:16:16,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:16:16,331 INFO L87 Difference]: Start difference. First operand 3127 states and 8732 transitions. Second operand has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:18,956 INFO L93 Difference]: Finished difference Result 4447 states and 11790 transitions. [2020-11-11 15:16:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-11 15:16:18,957 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 15:16:18,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:18,962 INFO L225 Difference]: With dead ends: 4447 [2020-11-11 15:16:18,962 INFO L226 Difference]: Without dead ends: 3920 [2020-11-11 15:16:18,963 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1326, Invalid=3644, Unknown=0, NotChecked=0, Total=4970 [2020-11-11 15:16:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2020-11-11 15:16:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 3137. [2020-11-11 15:16:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 2.7857142857142856) internal successors, (8736), 3136 states have internal predecessors, (8736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:19,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 8736 transitions. [2020-11-11 15:16:19,008 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 8736 transitions. Word has length 121 [2020-11-11 15:16:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:19,008 INFO L481 AbstractCegarLoop]: Abstraction has 3137 states and 8736 transitions. [2020-11-11 15:16:19,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:19,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 8736 transitions. [2020-11-11 15:16:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:19,011 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:19,011 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 15:16:19,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:19,212 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:19,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:19,213 INFO L82 PathProgramCache]: Analyzing trace with hash 473182784, now seen corresponding path program 186 times [2020-11-11 15:16:19,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:19,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359854906] [2020-11-11 15:16:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:19,886 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 15:16:19,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359854906] [2020-11-11 15:16:19,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882009789] [2020-11-11 15:16:19,887 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 15:16:19,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:16:19,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:19,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-11 15:16:19,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:20,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:20,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:20,136 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 15:16:20,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:20,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-11-11 15:16:20,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665985448] [2020-11-11 15:16:20,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-11 15:16:20,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:20,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-11 15:16:20,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2020-11-11 15:16:20,137 INFO L87 Difference]: Start difference. First operand 3137 states and 8736 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 15:16:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:21,423 INFO L93 Difference]: Finished difference Result 3957 states and 10504 transitions. [2020-11-11 15:16:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:16:21,424 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 15:16:21,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:21,430 INFO L225 Difference]: With dead ends: 3957 [2020-11-11 15:16:21,430 INFO L226 Difference]: Without dead ends: 3687 [2020-11-11 15:16:21,430 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:16:21,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2020-11-11 15:16:21,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 3222. [2020-11-11 15:16:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3222 states, 3221 states have (on average 2.7649798199316984) internal successors, (8906), 3221 states have internal predecessors, (8906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3222 states to 3222 states and 8906 transitions. [2020-11-11 15:16:21,475 INFO L78 Accepts]: Start accepts. Automaton has 3222 states and 8906 transitions. Word has length 126 [2020-11-11 15:16:21,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:21,476 INFO L481 AbstractCegarLoop]: Abstraction has 3222 states and 8906 transitions. [2020-11-11 15:16:21,476 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 15:16:21,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3222 states and 8906 transitions. [2020-11-11 15:16:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:21,479 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:21,479 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 15:16:21,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:21,680 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:21,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1810129262, now seen corresponding path program 187 times [2020-11-11 15:16:21,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:21,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123480471] [2020-11-11 15:16:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:22,330 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 15:16:22,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123480471] [2020-11-11 15:16:22,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788876468] [2020-11-11 15:16:22,331 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 15:16:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:22,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:22,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:22,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:22,465 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 15:16:22,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:22,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:16:22,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017278807] [2020-11-11 15:16:22,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:22,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:22,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:22,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:22,466 INFO L87 Difference]: Start difference. First operand 3222 states and 8906 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 15:16:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:23,608 INFO L93 Difference]: Finished difference Result 5070 states and 12730 transitions. [2020-11-11 15:16:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 15:16:23,609 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 15:16:23,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:23,616 INFO L225 Difference]: With dead ends: 5070 [2020-11-11 15:16:23,616 INFO L226 Difference]: Without dead ends: 4800 [2020-11-11 15:16:23,617 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 15:16:23,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4800 states. [2020-11-11 15:16:23,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4800 to 3237. [2020-11-11 15:16:23,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:16:23,691 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:16:23,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:23,691 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:16:23,691 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 15:16:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:16:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:23,694 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:23,694 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 15:16:23,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:23,895 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:23,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:23,896 INFO L82 PathProgramCache]: Analyzing trace with hash -232785314, now seen corresponding path program 188 times [2020-11-11 15:16:23,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:23,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52017880] [2020-11-11 15:16:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:24,584 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 15:16:24,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52017880] [2020-11-11 15:16:24,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521566822] [2020-11-11 15:16:24,585 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 15:16:24,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:16:24,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:24,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:24,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:24,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:24,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:24,764 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 15:16:24,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:24,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:16:24,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880639767] [2020-11-11 15:16:24,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:16:24,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:24,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:16:24,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:16:24,765 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:16:26,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:26,081 INFO L93 Difference]: Finished difference Result 4955 states and 12500 transitions. [2020-11-11 15:16:26,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:16:26,082 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 15:16:26,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:26,089 INFO L225 Difference]: With dead ends: 4955 [2020-11-11 15:16:26,089 INFO L226 Difference]: Without dead ends: 4685 [2020-11-11 15:16:26,089 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:16:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4685 states. [2020-11-11 15:16:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4685 to 3237. [2020-11-11 15:16:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:16:26,139 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:16:26,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:26,139 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:16:26,139 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 15:16:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:16:26,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:26,142 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:26,142 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 15:16:26,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-11-11 15:16:26,343 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:26,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:26,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1068644564, now seen corresponding path program 189 times [2020-11-11 15:16:26,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:26,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319650510] [2020-11-11 15:16:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:26,965 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 15:16:26,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319650510] [2020-11-11 15:16:26,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431111692] [2020-11-11 15:16:26,966 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 15:16:27,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:16:27,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:27,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:27,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:27,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:27,138 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 15:16:27,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:27,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:16:27,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348824506] [2020-11-11 15:16:27,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:27,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:27,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:27,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:27,139 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:16:28,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:28,395 INFO L93 Difference]: Finished difference Result 4930 states and 12450 transitions. [2020-11-11 15:16:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 15:16:28,397 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 15:16:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:28,403 INFO L225 Difference]: With dead ends: 4930 [2020-11-11 15:16:28,403 INFO L226 Difference]: Without dead ends: 4660 [2020-11-11 15:16:28,403 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2020-11-11 15:16:28,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4660 states. [2020-11-11 15:16:28,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4660 to 3237. [2020-11-11 15:16:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:16:28,452 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:16:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:28,452 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:16:28,452 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 15:16:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:16:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:28,455 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:28,455 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 15:16:28,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-11-11 15:16:28,656 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:28,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:28,656 INFO L82 PathProgramCache]: Analyzing trace with hash 613862428, now seen corresponding path program 190 times [2020-11-11 15:16:28,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:28,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692272390] [2020-11-11 15:16:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:29,321 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 15:16:29,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692272390] [2020-11-11 15:16:29,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038147005] [2020-11-11 15:16:29,322 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 15:16:29,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:16:29,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:29,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:16:29,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:29,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:29,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:29,500 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 15:16:29,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:29,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:16:29,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144720154] [2020-11-11 15:16:29,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:16:29,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:29,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:16:29,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:16:29,501 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:16:31,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:31,034 INFO L93 Difference]: Finished difference Result 4880 states and 12350 transitions. [2020-11-11 15:16:31,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 15:16:31,036 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 15:16:31,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:31,042 INFO L225 Difference]: With dead ends: 4880 [2020-11-11 15:16:31,042 INFO L226 Difference]: Without dead ends: 4610 [2020-11-11 15:16:31,042 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=696, Invalid=2166, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:16:31,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2020-11-11 15:16:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 3237. [2020-11-11 15:16:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:16:31,089 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:16:31,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:31,090 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:16:31,090 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 15:16:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:16:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:31,093 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:31,093 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 15:16:31,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-11-11 15:16:31,293 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:31,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:31,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1238785430, now seen corresponding path program 191 times [2020-11-11 15:16:31,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:31,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609911757] [2020-11-11 15:16:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:31,897 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 15:16:31,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609911757] [2020-11-11 15:16:31,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279249029] [2020-11-11 15:16:31,897 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 15:16:31,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:16:31,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:31,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:32,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:32,042 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 15:16:32,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:32,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:16:32,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850873878] [2020-11-11 15:16:32,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:32,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:32,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:32,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:32,043 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:16:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:33,400 INFO L93 Difference]: Finished difference Result 4830 states and 12250 transitions. [2020-11-11 15:16:33,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-11 15:16:33,401 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 15:16:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:33,408 INFO L225 Difference]: With dead ends: 4830 [2020-11-11 15:16:33,409 INFO L226 Difference]: Without dead ends: 4560 [2020-11-11 15:16:33,409 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2020-11-11 15:16:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4560 states. [2020-11-11 15:16:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4560 to 3237. [2020-11-11 15:16:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:16:33,458 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:16:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:33,458 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:16:33,458 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 15:16:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:16:33,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:33,461 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:33,461 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 15:16:33,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-11-11 15:16:33,662 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1172892838, now seen corresponding path program 192 times [2020-11-11 15:16:33,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:33,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402456122] [2020-11-11 15:16:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:34,329 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 15:16:34,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402456122] [2020-11-11 15:16:34,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335976404] [2020-11-11 15:16:34,329 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 15:16:34,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:16:34,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:34,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:34,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:34,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:34,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:34,522 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 15:16:34,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:34,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:16:34,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334047764] [2020-11-11 15:16:34,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:16:34,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:34,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:16:34,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:16:34,523 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:16:36,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:36,169 INFO L93 Difference]: Finished difference Result 4780 states and 12150 transitions. [2020-11-11 15:16:36,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 15:16:36,170 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 15:16:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:36,177 INFO L225 Difference]: With dead ends: 4780 [2020-11-11 15:16:36,177 INFO L226 Difference]: Without dead ends: 4510 [2020-11-11 15:16:36,177 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:16:36,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2020-11-11 15:16:36,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 3237. [2020-11-11 15:16:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:36,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:16:36,226 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:16:36,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:36,226 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:16:36,226 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 15:16:36,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:16:36,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:36,229 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:36,229 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 15:16:36,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-11-11 15:16:36,430 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:36,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:36,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1098591448, now seen corresponding path program 193 times [2020-11-11 15:16:36,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:36,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046244120] [2020-11-11 15:16:36,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:37,026 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 15:16:37,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046244120] [2020-11-11 15:16:37,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084718687] [2020-11-11 15:16:37,026 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 15:16:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:37,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:37,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:37,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:37,164 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 15:16:37,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:37,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:16:37,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831697594] [2020-11-11 15:16:37,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:37,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:37,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:37,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:37,165 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:16:38,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:38,626 INFO L93 Difference]: Finished difference Result 4730 states and 12050 transitions. [2020-11-11 15:16:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 15:16:38,628 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 15:16:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:38,634 INFO L225 Difference]: With dead ends: 4730 [2020-11-11 15:16:38,634 INFO L226 Difference]: Without dead ends: 4460 [2020-11-11 15:16:38,635 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 15:16:38,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2020-11-11 15:16:38,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3237. [2020-11-11 15:16:38,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:16:38,683 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:16:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:38,683 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:16:38,683 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 15:16:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:16:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:38,686 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:38,686 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 15:16:38,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:38,887 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:38,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:38,888 INFO L82 PathProgramCache]: Analyzing trace with hash -462573544, now seen corresponding path program 194 times [2020-11-11 15:16:38,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:38,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857784843] [2020-11-11 15:16:38,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:39,501 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 15:16:39,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857784843] [2020-11-11 15:16:39,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360300234] [2020-11-11 15:16:39,502 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 15:16:39,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:16:39,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:39,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:39,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:39,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:39,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:39,686 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 15:16:39,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:39,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:16:39,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875299238] [2020-11-11 15:16:39,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:16:39,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:39,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:16:39,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:16:39,687 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:16:41,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:41,535 INFO L93 Difference]: Finished difference Result 4680 states and 11950 transitions. [2020-11-11 15:16:41,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 15:16:41,536 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 15:16:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:41,543 INFO L225 Difference]: With dead ends: 4680 [2020-11-11 15:16:41,543 INFO L226 Difference]: Without dead ends: 4410 [2020-11-11 15:16:41,543 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=770, Invalid=2536, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:16:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2020-11-11 15:16:41,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 3237. [2020-11-11 15:16:41,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:16:41,625 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:16:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:41,625 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:16:41,625 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 15:16:41,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:16:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:41,628 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:41,629 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 15:16:41,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-11-11 15:16:41,829 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:41,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:41,830 INFO L82 PathProgramCache]: Analyzing trace with hash -352044698, now seen corresponding path program 195 times [2020-11-11 15:16:41,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:41,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521950277] [2020-11-11 15:16:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:42,391 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 15:16:42,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521950277] [2020-11-11 15:16:42,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134551494] [2020-11-11 15:16:42,391 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 15:16:42,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:16:42,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:42,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:42,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:42,563 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 15:16:42,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:42,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:16:42,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749697318] [2020-11-11 15:16:42,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:42,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:42,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:42,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:42,565 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:16:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:44,104 INFO L93 Difference]: Finished difference Result 4630 states and 11850 transitions. [2020-11-11 15:16:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-11-11 15:16:44,105 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 15:16:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:44,112 INFO L225 Difference]: With dead ends: 4630 [2020-11-11 15:16:44,112 INFO L226 Difference]: Without dead ends: 4360 [2020-11-11 15:16:44,112 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2020-11-11 15:16:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4360 states. [2020-11-11 15:16:44,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4360 to 3237. [2020-11-11 15:16:44,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:16:44,162 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:16:44,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:44,162 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:16:44,162 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 15:16:44,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:16:44,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:44,165 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:44,165 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 15:16:44,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-11-11 15:16:44,366 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:44,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:44,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1711243862, now seen corresponding path program 196 times [2020-11-11 15:16:44,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:44,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139433664] [2020-11-11 15:16:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:44,966 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 15:16:44,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139433664] [2020-11-11 15:16:44,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463475997] [2020-11-11 15:16:44,966 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 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 15:16:45,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:16:45,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:45,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:16:45,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:45,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:45,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:45,176 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 15:16:45,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:45,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:16:45,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107376771] [2020-11-11 15:16:45,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:16:45,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:45,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:16:45,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:16:45,177 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:16:47,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:47,197 INFO L93 Difference]: Finished difference Result 4580 states and 11750 transitions. [2020-11-11 15:16:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 15:16:47,198 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 15:16:47,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:47,205 INFO L225 Difference]: With dead ends: 4580 [2020-11-11 15:16:47,205 INFO L226 Difference]: Without dead ends: 4310 [2020-11-11 15:16:47,205 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=831, Invalid=2709, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:16:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2020-11-11 15:16:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 3237. [2020-11-11 15:16:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:47,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:16:47,253 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:16:47,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:47,253 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:16:47,253 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 15:16:47,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:16:47,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:47,256 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:47,256 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 15:16:47,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:47,457 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:47,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:47,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1273279780, now seen corresponding path program 197 times [2020-11-11 15:16:47,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:47,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707926203] [2020-11-11 15:16:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:48,006 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 15:16:48,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707926203] [2020-11-11 15:16:48,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499012328] [2020-11-11 15:16:48,007 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 15:16:48,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:16:48,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:48,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:48,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:48,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:48,157 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 15:16:48,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:48,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:16:48,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635264769] [2020-11-11 15:16:48,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:48,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:48,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:48,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:48,158 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:16:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:49,872 INFO L93 Difference]: Finished difference Result 4530 states and 11650 transitions. [2020-11-11 15:16:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 15:16:49,873 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 15:16:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:49,879 INFO L225 Difference]: With dead ends: 4530 [2020-11-11 15:16:49,879 INFO L226 Difference]: Without dead ends: 4260 [2020-11-11 15:16:49,880 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2020-11-11 15:16:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2020-11-11 15:16:49,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 3237. [2020-11-11 15:16:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:16:49,926 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:16:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:49,926 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:16:49,927 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 15:16:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:16:49,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:49,929 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:49,930 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 15:16:50,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:50,130 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:50,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:50,131 INFO L82 PathProgramCache]: Analyzing trace with hash -272012780, now seen corresponding path program 198 times [2020-11-11 15:16:50,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:50,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615760386] [2020-11-11 15:16:50,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:50,714 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 15:16:50,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615760386] [2020-11-11 15:16:50,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854318431] [2020-11-11 15:16:50,715 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 15:16:50,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:16:50,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:50,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:50,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:50,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:50,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:50,916 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 15:16:50,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:50,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:16:50,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169617032] [2020-11-11 15:16:50,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:16:50,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:50,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:16:50,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:16:50,917 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:16:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:53,085 INFO L93 Difference]: Finished difference Result 4480 states and 11550 transitions. [2020-11-11 15:16:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 15:16:53,086 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 15:16:53,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:53,093 INFO L225 Difference]: With dead ends: 4480 [2020-11-11 15:16:53,093 INFO L226 Difference]: Without dead ends: 4210 [2020-11-11 15:16:53,094 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=908, Invalid=2874, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:16:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2020-11-11 15:16:53,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 3237. [2020-11-11 15:16:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:16:53,171 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:16:53,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:53,171 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:16:53,171 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 15:16:53,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:16:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:53,174 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:53,174 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 15:16:53,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:53,375 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash -839178654, now seen corresponding path program 199 times [2020-11-11 15:16:53,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:53,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842503776] [2020-11-11 15:16:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:53,976 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 15:16:53,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842503776] [2020-11-11 15:16:53,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889750251] [2020-11-11 15:16:53,977 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 15:16:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:54,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:54,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:54,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:54,118 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 15:16:54,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:54,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:16:54,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404999269] [2020-11-11 15:16:54,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:16:54,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:54,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:16:54,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:16:54,119 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:16:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:55,926 INFO L93 Difference]: Finished difference Result 4430 states and 11450 transitions. [2020-11-11 15:16:55,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-11 15:16:55,927 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 15:16:55,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:55,933 INFO L225 Difference]: With dead ends: 4430 [2020-11-11 15:16:55,934 INFO L226 Difference]: Without dead ends: 4160 [2020-11-11 15:16:55,934 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 15:16:55,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4160 states. [2020-11-11 15:16:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4160 to 3237. [2020-11-11 15:16:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:16:55,981 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:16:55,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:55,981 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:16:55,981 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 15:16:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:16:55,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:55,984 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:55,984 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 15:16:56,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:16:56,185 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:56,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:56,185 INFO L82 PathProgramCache]: Analyzing trace with hash -10467502, now seen corresponding path program 200 times [2020-11-11 15:16:56,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:56,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106844727] [2020-11-11 15:16:56,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:16:56,750 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 15:16:56,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106844727] [2020-11-11 15:16:56,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999331307] [2020-11-11 15:16:56,750 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 15:16:56,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:16:56,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:16:56,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:16:56,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:16:56,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:16:56,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:16:56,965 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 15:16:56,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:16:56,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:16:56,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784818778] [2020-11-11 15:16:56,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:16:56,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:16:56,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:16:56,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:16:56,967 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:16:59,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:16:59,365 INFO L93 Difference]: Finished difference Result 4380 states and 11350 transitions. [2020-11-11 15:16:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 15:16:59,367 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 15:16:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:16:59,373 INFO L225 Difference]: With dead ends: 4380 [2020-11-11 15:16:59,373 INFO L226 Difference]: Without dead ends: 4110 [2020-11-11 15:16:59,374 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1001, Invalid=3031, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:16:59,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2020-11-11 15:16:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 3237. [2020-11-11 15:16:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:16:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:16:59,420 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:16:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:16:59,420 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:16:59,420 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 15:16:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:16:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:16:59,423 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:16:59,423 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 15:16:59,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-11-11 15:16:59,624 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:16:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:16:59,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1733006048, now seen corresponding path program 201 times [2020-11-11 15:16:59,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:16:59,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471808671] [2020-11-11 15:16:59,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:16:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:00,170 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 15:17:00,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471808671] [2020-11-11 15:17:00,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261655361] [2020-11-11 15:17:00,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:17:00,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:17:00,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:00,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:17:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:00,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:00,329 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 15:17:00,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:00,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:17:00,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296726732] [2020-11-11 15:17:00,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:00,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:00,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:00,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:00,331 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:17:02,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:02,310 INFO L93 Difference]: Finished difference Result 4330 states and 11250 transitions. [2020-11-11 15:17:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 15:17:02,311 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 15:17:02,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:02,317 INFO L225 Difference]: With dead ends: 4330 [2020-11-11 15:17:02,317 INFO L226 Difference]: Without dead ends: 4060 [2020-11-11 15:17:02,317 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2020-11-11 15:17:02,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2020-11-11 15:17:02,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 3237. [2020-11-11 15:17:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:17:02,363 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:17:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:02,363 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:17:02,363 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 15:17:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:17:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:17:02,366 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:02,366 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 15:17:02,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-11-11 15:17:02,567 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:02,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:02,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1022425616, now seen corresponding path program 202 times [2020-11-11 15:17:02,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:02,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444283274] [2020-11-11 15:17:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:03,133 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 15:17:03,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444283274] [2020-11-11 15:17:03,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116197915] [2020-11-11 15:17:03,133 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 15:17:03,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:17:03,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:03,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-11 15:17:03,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:03,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:03,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:03,322 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 15:17:03,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:03,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:17:03,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010220610] [2020-11-11 15:17:03,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:03,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:03,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:03,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:03,324 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:17:05,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:05,957 INFO L93 Difference]: Finished difference Result 4280 states and 11150 transitions. [2020-11-11 15:17:05,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-11 15:17:05,958 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 15:17:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:05,963 INFO L225 Difference]: With dead ends: 4280 [2020-11-11 15:17:05,963 INFO L226 Difference]: Without dead ends: 4010 [2020-11-11 15:17:05,963 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1110, Invalid=3180, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:17:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2020-11-11 15:17:05,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 3237. [2020-11-11 15:17:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:06,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:17:06,008 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:17:06,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:06,008 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:17:06,008 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 15:17:06,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:17:06,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:17:06,011 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:06,011 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 15:17:06,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-11-11 15:17:06,212 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:06,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:06,213 INFO L82 PathProgramCache]: Analyzing trace with hash -334141090, now seen corresponding path program 203 times [2020-11-11 15:17:06,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:06,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783841249] [2020-11-11 15:17:06,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:06,763 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 15:17:06,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783841249] [2020-11-11 15:17:06,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164636962] [2020-11-11 15:17:06,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:17:06,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 15:17:06,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:06,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:17:06,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:06,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:06,917 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 15:17:06,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:06,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:17:06,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185248412] [2020-11-11 15:17:06,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:06,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:06,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:06,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:06,918 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:17:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:08,983 INFO L93 Difference]: Finished difference Result 4230 states and 11050 transitions. [2020-11-11 15:17:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-11 15:17:08,984 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 15:17:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:08,990 INFO L225 Difference]: With dead ends: 4230 [2020-11-11 15:17:08,990 INFO L226 Difference]: Without dead ends: 3960 [2020-11-11 15:17:08,991 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2020-11-11 15:17:08,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3960 states. [2020-11-11 15:17:09,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3960 to 3237. [2020-11-11 15:17:09,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.761433868974042) internal successors, (8936), 3236 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8936 transitions. [2020-11-11 15:17:09,036 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8936 transitions. Word has length 126 [2020-11-11 15:17:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:09,037 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8936 transitions. [2020-11-11 15:17:09,037 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 15:17:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8936 transitions. [2020-11-11 15:17:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:17:09,040 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:09,040 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 15:17:09,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2020-11-11 15:17:09,241 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1497391694, now seen corresponding path program 204 times [2020-11-11 15:17:09,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:09,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323213525] [2020-11-11 15:17:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:09,829 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 15:17:09,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323213525] [2020-11-11 15:17:09,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642764156] [2020-11-11 15:17:09,830 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 15:17:09,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-11 15:17:09,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:09,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:17:09,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:09,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:10,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:10,033 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 15:17:10,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:10,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:17:10,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950792973] [2020-11-11 15:17:10,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:10,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:10,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:10,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:10,034 INFO L87 Difference]: Start difference. First operand 3237 states and 8936 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 15:17:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:12,806 INFO L93 Difference]: Finished difference Result 4225 states and 11060 transitions. [2020-11-11 15:17:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-11 15:17:12,807 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 15:17:12,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:12,813 INFO L225 Difference]: With dead ends: 4225 [2020-11-11 15:17:12,813 INFO L226 Difference]: Without dead ends: 3955 [2020-11-11 15:17:12,814 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1235, Invalid=3321, Unknown=0, NotChecked=0, Total=4556 [2020-11-11 15:17:12,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2020-11-11 15:17:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3237. [2020-11-11 15:17:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 2.762978986402967) internal successors, (8941), 3236 states have internal predecessors, (8941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 8941 transitions. [2020-11-11 15:17:12,860 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 8941 transitions. Word has length 126 [2020-11-11 15:17:12,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:12,860 INFO L481 AbstractCegarLoop]: Abstraction has 3237 states and 8941 transitions. [2020-11-11 15:17:12,860 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 15:17:12,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 8941 transitions. [2020-11-11 15:17:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:17:12,863 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:12,863 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 15:17:13,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-11-11 15:17:13,064 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:13,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2126183196, now seen corresponding path program 205 times [2020-11-11 15:17:13,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:13,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596290873] [2020-11-11 15:17:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:13,606 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 15:17:13,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596290873] [2020-11-11 15:17:13,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352418676] [2020-11-11 15:17:13,606 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 15:17:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:13,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:17:13,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:13,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:13,798 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 15:17:13,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:13,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-11-11 15:17:13,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287954430] [2020-11-11 15:17:13,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 15:17:13,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:13,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 15:17:13,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:13,800 INFO L87 Difference]: Start difference. First operand 3237 states and 8941 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 15:17:16,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:16,033 INFO L93 Difference]: Finished difference Result 5312 states and 14194 transitions. [2020-11-11 15:17:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-11 15:17:16,034 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 15:17:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:16,041 INFO L225 Difference]: With dead ends: 5312 [2020-11-11 15:17:16,041 INFO L226 Difference]: Without dead ends: 5042 [2020-11-11 15:17:16,042 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 15:17:16,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5042 states. [2020-11-11 15:17:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5042 to 3362. [2020-11-11 15:17:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3362 states, 3361 states have (on average 2.776554596846177) internal successors, (9332), 3361 states have internal predecessors, (9332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3362 states to 3362 states and 9332 transitions. [2020-11-11 15:17:16,098 INFO L78 Accepts]: Start accepts. Automaton has 3362 states and 9332 transitions. Word has length 126 [2020-11-11 15:17:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:16,098 INFO L481 AbstractCegarLoop]: Abstraction has 3362 states and 9332 transitions. [2020-11-11 15:17:16,098 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 15:17:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3362 states and 9332 transitions. [2020-11-11 15:17:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-11 15:17:16,101 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:16,101 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 15:17:16,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:16,302 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:16,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:16,302 INFO L82 PathProgramCache]: Analyzing trace with hash -457576146, now seen corresponding path program 206 times [2020-11-11 15:17:16,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:16,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777122760] [2020-11-11 15:17:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:16,868 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 15:17:16,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777122760] [2020-11-11 15:17:16,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594595727] [2020-11-11 15:17:16,869 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 15:17:16,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 15:17:16,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:16,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-11 15:17:16,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:17,018 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 15:17:17,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 15:17:17,062 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 15:17:17,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 15:17:17,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-11 15:17:17,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39386675] [2020-11-11 15:17:17,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-11 15:17:17,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:17,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-11 15:17:17,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2020-11-11 15:17:17,064 INFO L87 Difference]: Start difference. First operand 3362 states and 9332 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 15:17:19,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:19,783 INFO L93 Difference]: Finished difference Result 4223 states and 11166 transitions. [2020-11-11 15:17:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-11 15:17:19,784 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 15:17:19,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:19,791 INFO L225 Difference]: With dead ends: 4223 [2020-11-11 15:17:19,791 INFO L226 Difference]: Without dead ends: 3890 [2020-11-11 15:17:19,791 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2020-11-11 15:17:19,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2020-11-11 15:17:19,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3262. [2020-11-11 15:17:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3261 states have (on average 2.7709291628334864) internal successors, (9036), 3261 states have internal predecessors, (9036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 9036 transitions. [2020-11-11 15:17:19,837 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 9036 transitions. Word has length 126 [2020-11-11 15:17:19,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:19,837 INFO L481 AbstractCegarLoop]: Abstraction has 3262 states and 9036 transitions. [2020-11-11 15:17:19,837 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 15:17:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 9036 transitions. [2020-11-11 15:17:19,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:17:19,840 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:19,840 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 15:17:20,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-11-11 15:17:20,041 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:20,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:20,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1003443911, now seen corresponding path program 207 times [2020-11-11 15:17:20,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:20,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418599293] [2020-11-11 15:17:20,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 397 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:20,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418599293] [2020-11-11 15:17:20,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591109856] [2020-11-11 15:17:20,573 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 15:17:20,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-11 15:17:20,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:20,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:17:20,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 443 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 15:17:20,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-11 15:17:20,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2020-11-11 15:17:20,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559385484] [2020-11-11 15:17:20,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:17:20,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:20,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:17:20,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:20,770 INFO L87 Difference]: Start difference. First operand 3262 states and 9036 transitions. Second operand has 23 states, 23 states have (on average 5.695652173913044) internal successors, (131), 23 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:21,668 INFO L93 Difference]: Finished difference Result 14495 states and 39387 transitions. [2020-11-11 15:17:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:17:21,669 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.695652173913044) internal successors, (131), 23 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have 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 15:17:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:21,673 INFO L225 Difference]: With dead ends: 14495 [2020-11-11 15:17:21,673 INFO L226 Difference]: Without dead ends: 2535 [2020-11-11 15:17:21,673 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 15:17:21,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2020-11-11 15:17:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 2495. [2020-11-11 15:17:21,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2494 states have (on average 2.447072975140337) internal successors, (6103), 2494 states have internal predecessors, (6103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 6103 transitions. [2020-11-11 15:17:21,703 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 6103 transitions. Word has length 131 [2020-11-11 15:17:21,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:21,703 INFO L481 AbstractCegarLoop]: Abstraction has 2495 states and 6103 transitions. [2020-11-11 15:17:21,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.695652173913044) internal successors, (131), 23 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:21,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 6103 transitions. [2020-11-11 15:17:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-11 15:17:21,730 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 15:17:21,730 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 15:17:21,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:21,930 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 15:17:21,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 15:17:21,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1630802088, now seen corresponding path program 208 times [2020-11-11 15:17:21,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 15:17:21,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134462024] [2020-11-11 15:17:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 15:17:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 15:17:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 356 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:17:22,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134462024] [2020-11-11 15:17:22,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249522452] [2020-11-11 15:17:22,439 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 15:17:22,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 15:17:22,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 15:17:22,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 15:17:22,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 15:17:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 442 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-11 15:17:22,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-11 15:17:22,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2020-11-11 15:17:22,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447115128] [2020-11-11 15:17:22,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 15:17:22,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 15:17:22,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 15:17:22,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2020-11-11 15:17:22,597 INFO L87 Difference]: Start difference. First operand 2495 states and 6103 transitions. Second operand has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:23,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 15:17:23,427 INFO L93 Difference]: Finished difference Result 10723 states and 25252 transitions. [2020-11-11 15:17:23,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 15:17:23,429 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2020-11-11 15:17:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 15:17:23,429 INFO L225 Difference]: With dead ends: 10723 [2020-11-11 15:17:23,429 INFO L226 Difference]: Without dead ends: 0 [2020-11-11 15:17:23,429 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 15:17:23,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-11 15:17:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-11 15:17:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:23,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-11 15:17:23,430 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 131 [2020-11-11 15:17:23,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 15:17:23,430 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-11 15:17:23,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 15:17:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-11 15:17:23,430 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-11 15:17:23,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 15:17:23,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 03:17:23 BasicIcfg [2020-11-11 15:17:23,637 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 15:17:23,638 INFO L168 Benchmark]: Toolchain (without parser) took 379316.03 ms. Allocated memory was 318.8 MB in the beginning and 826.3 MB in the end (delta: 507.5 MB). Free memory was 293.7 MB in the beginning and 569.7 MB in the end (delta: -276.0 MB). Peak memory consumption was 233.0 MB. Max. memory is 16.0 GB. [2020-11-11 15:17:23,638 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 318.8 MB. Free memory is still 289.1 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 15:17:23,639 INFO L168 Benchmark]: CACSL2BoogieTranslator took 702.61 ms. Allocated memory is still 318.8 MB. Free memory was 293.2 MB in the beginning and 264.4 MB in the end (delta: 28.8 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2020-11-11 15:17:23,639 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.10 ms. Allocated memory is still 318.8 MB. Free memory was 264.2 MB in the beginning and 300.3 MB in the end (delta: -36.1 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.0 GB. [2020-11-11 15:17:23,639 INFO L168 Benchmark]: Boogie Preprocessor took 57.02 ms. Allocated memory is still 318.8 MB. Free memory was 300.3 MB in the beginning and 299.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 15:17:23,640 INFO L168 Benchmark]: RCFGBuilder took 559.91 ms. Allocated memory is still 318.8 MB. Free memory was 299.3 MB in the beginning and 278.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2020-11-11 15:17:23,640 INFO L168 Benchmark]: TraceAbstraction took 377896.74 ms. Allocated memory was 318.8 MB in the beginning and 826.3 MB in the end (delta: 507.5 MB). Free memory was 277.2 MB in the beginning and 569.7 MB in the end (delta: -292.5 MB). Peak memory consumption was 214.0 MB. Max. memory is 16.0 GB. [2020-11-11 15:17:23,641 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 318.8 MB. Free memory is still 289.1 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 702.61 ms. Allocated memory is still 318.8 MB. Free memory was 293.2 MB in the beginning and 264.4 MB in the end (delta: 28.8 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 87.10 ms. Allocated memory is still 318.8 MB. Free memory was 264.2 MB in the beginning and 300.3 MB in the end (delta: -36.1 MB). Peak memory consumption was 6.5 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 57.02 ms. Allocated memory is still 318.8 MB. Free memory was 300.3 MB in the beginning and 299.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 559.91 ms. Allocated memory is still 318.8 MB. Free memory was 299.3 MB in the beginning and 278.3 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 377896.74 ms. Allocated memory was 318.8 MB in the beginning and 826.3 MB in the end (delta: 507.5 MB). Free memory was 277.2 MB in the beginning and 569.7 MB in the end (delta: -292.5 MB). Peak memory consumption was 214.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 685]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 377.7s, OverallIterations: 220, TraceHistogramMax: 11, AutomataDifference: 219.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 20251 SDtfs, 146546 SDslu, 179375 SDs, 0 SdLazy, 33675 SolverSat, 23059 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29337 GetRequests, 20068 SyntacticMatches, 191 SemanticMatches, 9078 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99786 ImplicationChecksByTransitivity, 223.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3362occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 8.3s AutomataMinimizationTime, 220 MinimizatonAttempts, 184742 StatesRemovedByMinimization, 219 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.2s SsaConstructionTime, 8.7s SatisfiabilityAnalysisTime, 81.7s InterpolantComputationTime, 40662 NumberOfCodeBlocks, 40658 NumberOfCodeBlocksAsserted, 1207 NumberOfCheckSat, 40229 ConstructedInterpolants, 0 QuantifiedInterpolants, 16704389 SizeOfPredicates, 3608 NumberOfNonLiveVariables, 42210 ConjunctsInSsa, 4278 ConjunctsInUnsatCore, 433 InterpolantComputations, 9 PerfectInterpolantSequences, 1648/83716 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 proved your program to be correct! Received shutdown request...