/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-16 14:08:05,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-16 14:08:05,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-16 14:08:05,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-16 14:08:05,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-16 14:08:05,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-16 14:08:05,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-16 14:08:05,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-16 14:08:05,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-16 14:08:05,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-16 14:08:05,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-16 14:08:05,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-16 14:08:05,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-16 14:08:05,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-16 14:08:05,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-16 14:08:05,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-16 14:08:05,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-16 14:08:05,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-16 14:08:05,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-16 14:08:05,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-16 14:08:05,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-16 14:08:05,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-16 14:08:05,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-16 14:08:05,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-16 14:08:05,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-16 14:08:05,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-16 14:08:05,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-16 14:08:05,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-16 14:08:05,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-16 14:08:05,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-16 14:08:05,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-16 14:08:05,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-16 14:08:05,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-16 14:08:05,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-16 14:08:05,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-16 14:08:05,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-16 14:08:05,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-16 14:08:05,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-16 14:08:05,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-16 14:08:05,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-16 14:08:05,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-16 14:08:05,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-16 14:08:05,892 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-16 14:08:05,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-16 14:08:05,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-16 14:08:05,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-16 14:08:05,897 INFO L138 SettingsManager]: * Use SBE=true [2020-09-16 14:08:05,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-16 14:08:05,897 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-16 14:08:05,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-16 14:08:05,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-16 14:08:05,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-16 14:08:05,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-16 14:08:05,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-16 14:08:05,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-16 14:08:05,898 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-16 14:08:05,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-16 14:08:05,900 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-16 14:08:05,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-16 14:08:05,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-16 14:08:05,900 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-16 14:08:05,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-16 14:08:05,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-16 14:08:05,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-16 14:08:05,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-16 14:08:05,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-16 14:08:05,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-16 14:08:05,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-16 14:08:05,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-16 14:08:05,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-16 14:08:05,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-16 14:08:05,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-16 14:08:06,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-16 14:08:06,405 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-16 14:08:06,409 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-16 14:08:06,411 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-16 14:08:06,412 INFO L275 PluginConnector]: CDTParser initialized [2020-09-16 14:08:06,413 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-09-16 14:08:06,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9907453/7cf064ad69d84eb38276b9bb63d126da/FLAG9296aa6b7 [2020-09-16 14:08:07,156 INFO L306 CDTParser]: Found 1 translation units. [2020-09-16 14:08:07,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-09-16 14:08:07,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9907453/7cf064ad69d84eb38276b9bb63d126da/FLAG9296aa6b7 [2020-09-16 14:08:07,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e9907453/7cf064ad69d84eb38276b9bb63d126da [2020-09-16 14:08:07,407 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-16 14:08:07,415 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-16 14:08:07,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-16 14:08:07,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-16 14:08:07,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-16 14:08:07,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a52987c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:07, skipping insertion in model container [2020-09-16 14:08:07,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 02:08:07" (1/1) ... [2020-09-16 14:08:07,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-16 14:08:07,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-16 14:08:08,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 14:08:08,109 INFO L203 MainTranslator]: Completed pre-run [2020-09-16 14:08:08,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 14:08:08,241 INFO L208 MainTranslator]: Completed translation [2020-09-16 14:08:08,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:08 WrapperNode [2020-09-16 14:08:08,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-16 14:08:08,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-16 14:08:08,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-16 14:08:08,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-16 14:08:08,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:08" (1/1) ... [2020-09-16 14:08:08,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:08" (1/1) ... [2020-09-16 14:08:08,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-16 14:08:08,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-16 14:08:08,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-16 14:08:08,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-16 14:08:08,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:08" (1/1) ... [2020-09-16 14:08:08,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:08" (1/1) ... [2020-09-16 14:08:08,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:08" (1/1) ... [2020-09-16 14:08:08,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:08" (1/1) ... [2020-09-16 14:08:08,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:08" (1/1) ... [2020-09-16 14:08:08,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:08" (1/1) ... [2020-09-16 14:08:08,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:08" (1/1) ... [2020-09-16 14:08:08,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-16 14:08:08,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-16 14:08:08,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-16 14:08:08,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-16 14:08:08,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:08" (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 [2020-09-16 14:08:08,442 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-16 14:08:08,443 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-16 14:08:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-16 14:08:08,444 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-16 14:08:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-16 14:08:08,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-16 14:08:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-16 14:08:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-16 14:08:08,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-16 14:08:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-16 14:08:08,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-16 14:08:08,448 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-16 14:08:08,789 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-16 14:08:08,790 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-16 14:08:08,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 02:08:08 BoogieIcfgContainer [2020-09-16 14:08:08,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-16 14:08:08,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-16 14:08:08,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-16 14:08:08,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-16 14:08:08,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 02:08:07" (1/3) ... [2020-09-16 14:08:08,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1960b29e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 02:08:08, skipping insertion in model container [2020-09-16 14:08:08,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 02:08:08" (2/3) ... [2020-09-16 14:08:08,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1960b29e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 02:08:08, skipping insertion in model container [2020-09-16 14:08:08,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 02:08:08" (3/3) ... [2020-09-16 14:08:08,804 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-09-16 14:08:08,816 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-16 14:08:08,817 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-16 14:08:08,827 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-16 14:08:08,828 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-16 14:08:08,861 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,861 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,862 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,862 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,864 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,864 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,864 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,865 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,865 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,865 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,866 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,866 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,866 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,867 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,867 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,867 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,868 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,868 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,869 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,869 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,869 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,870 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,870 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,870 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,871 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,871 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,871 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,871 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,876 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,876 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,876 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,877 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,877 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,877 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,885 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,885 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,885 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,885 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,886 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,886 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 14:08:08,907 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-16 14:08:08,931 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-16 14:08:08,931 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-16 14:08:08,931 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-16 14:08:08,931 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-16 14:08:08,932 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-16 14:08:08,932 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-16 14:08:08,932 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-16 14:08:08,932 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-16 14:08:08,948 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-16 14:08:08,951 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-16 14:08:08,996 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-16 14:08:08,997 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-16 14:08:09,003 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-16 14:08:09,006 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-16 14:08:09,025 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-16 14:08:09,025 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-16 14:08:09,026 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-16 14:08:09,028 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-16 14:08:09,030 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-16 14:08:10,145 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-16 14:08:10,387 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-16 14:08:10,387 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-16 14:08:10,393 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-16 14:08:10,407 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-16 14:08:10,410 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-16 14:08:10,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-16 14:08:10,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:10,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-16 14:08:10,438 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:10,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:10,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-16 14:08:10,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:10,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284766032] [2020-09-16 14:08:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:10,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284766032] [2020-09-16 14:08:10,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:10,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-16 14:08:10,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419485889] [2020-09-16 14:08:10,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-16 14:08:10,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:10,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-16 14:08:10,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-16 14:08:10,750 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-16 14:08:10,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:10,834 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-16 14:08:10,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-16 14:08:10,836 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-16 14:08:10,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:10,851 INFO L225 Difference]: With dead ends: 75 [2020-09-16 14:08:10,852 INFO L226 Difference]: Without dead ends: 42 [2020-09-16 14:08:10,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-16 14:08:10,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-16 14:08:10,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-16 14:08:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-16 14:08:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-16 14:08:10,900 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-16 14:08:10,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:10,901 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-16 14:08:10,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-16 14:08:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-16 14:08:10,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 14:08:10,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:10,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:10,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-16 14:08:10,903 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:10,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:10,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-16 14:08:10,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:10,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74196225] [2020-09-16 14:08:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:11,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74196225] [2020-09-16 14:08:11,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:11,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 14:08:11,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771686652] [2020-09-16 14:08:11,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-16 14:08:11,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:11,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-16 14:08:11,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-16 14:08:11,006 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-16 14:08:11,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:11,041 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-16 14:08:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 14:08:11,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-16 14:08:11,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:11,043 INFO L225 Difference]: With dead ends: 56 [2020-09-16 14:08:11,044 INFO L226 Difference]: Without dead ends: 50 [2020-09-16 14:08:11,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-16 14:08:11,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-16 14:08:11,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-16 14:08:11,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-16 14:08:11,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-16 14:08:11,053 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-16 14:08:11,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:11,055 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-16 14:08:11,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-16 14:08:11,055 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-16 14:08:11,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 14:08:11,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:11,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:11,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-16 14:08:11,057 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:11,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-16 14:08:11,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:11,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894208138] [2020-09-16 14:08:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:11,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894208138] [2020-09-16 14:08:11,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:11,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 14:08:11,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166129454] [2020-09-16 14:08:11,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 14:08:11,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:11,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 14:08:11,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-16 14:08:11,183 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-16 14:08:11,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:11,282 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-16 14:08:11,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 14:08:11,283 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 14:08:11,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:11,284 INFO L225 Difference]: With dead ends: 78 [2020-09-16 14:08:11,285 INFO L226 Difference]: Without dead ends: 71 [2020-09-16 14:08:11,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:11,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-16 14:08:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-16 14:08:11,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-16 14:08:11,294 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-16 14:08:11,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:11,295 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-16 14:08:11,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 14:08:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-16 14:08:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 14:08:11,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:11,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:11,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-16 14:08:11,297 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:11,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:11,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-16 14:08:11,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:11,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160891492] [2020-09-16 14:08:11,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:11,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160891492] [2020-09-16 14:08:11,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:11,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 14:08:11,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014079092] [2020-09-16 14:08:11,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 14:08:11,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 14:08:11,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-16 14:08:11,399 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-16 14:08:11,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:11,478 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-16 14:08:11,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 14:08:11,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 14:08:11,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:11,480 INFO L225 Difference]: With dead ends: 54 [2020-09-16 14:08:11,480 INFO L226 Difference]: Without dead ends: 43 [2020-09-16 14:08:11,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:11,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-16 14:08:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-16 14:08:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-16 14:08:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-16 14:08:11,486 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-16 14:08:11,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:11,487 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-16 14:08:11,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 14:08:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-16 14:08:11,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 14:08:11,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:11,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:11,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-16 14:08:11,488 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:11,489 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-16 14:08:11,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:11,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023238911] [2020-09-16 14:08:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:11,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023238911] [2020-09-16 14:08:11,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 14:08:11,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 14:08:11,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681961604] [2020-09-16 14:08:11,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 14:08:11,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:11,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 14:08:11,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-16 14:08:11,582 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-16 14:08:11,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:11,666 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-16 14:08:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 14:08:11,667 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 14:08:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:11,668 INFO L225 Difference]: With dead ends: 57 [2020-09-16 14:08:11,669 INFO L226 Difference]: Without dead ends: 51 [2020-09-16 14:08:11,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:11,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-16 14:08:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-16 14:08:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-16 14:08:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-16 14:08:11,676 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-16 14:08:11,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:11,676 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-16 14:08:11,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 14:08:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-16 14:08:11,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:11,677 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:11,677 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:11,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-16 14:08:11,678 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:11,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:11,678 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-16 14:08:11,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:11,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606448960] [2020-09-16 14:08:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:11,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606448960] [2020-09-16 14:08:11,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940786082] [2020-09-16 14:08:11,757 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 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 [2020-09-16 14:08:11,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:11,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:11,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:11,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:11,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:11,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:11,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-16 14:08:11,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73505477] [2020-09-16 14:08:11,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:11,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:11,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:11,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:11,882 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-16 14:08:12,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:12,041 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-16 14:08:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 14:08:12,042 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-16 14:08:12,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:12,043 INFO L225 Difference]: With dead ends: 48 [2020-09-16 14:08:12,043 INFO L226 Difference]: Without dead ends: 43 [2020-09-16 14:08:12,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:12,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-16 14:08:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-16 14:08:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-16 14:08:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-16 14:08:12,052 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-16 14:08:12,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:12,052 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-16 14:08:12,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:12,053 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-16 14:08:12,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:12,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:12,053 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:12,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-16 14:08:12,255 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:12,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:12,256 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-16 14:08:12,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:12,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635244727] [2020-09-16 14:08:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:12,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635244727] [2020-09-16 14:08:12,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880879804] [2020-09-16 14:08:12,367 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 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 [2020-09-16 14:08:12,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:12,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:12,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:12,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:12,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:12,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-16 14:08:12,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125494811] [2020-09-16 14:08:12,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-16 14:08:12,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:12,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-16 14:08:12,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-16 14:08:12,455 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-16 14:08:12,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:12,557 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-16 14:08:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 14:08:12,557 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-16 14:08:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:12,558 INFO L225 Difference]: With dead ends: 54 [2020-09-16 14:08:12,558 INFO L226 Difference]: Without dead ends: 48 [2020-09-16 14:08:12,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:12,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-16 14:08:12,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-16 14:08:12,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-16 14:08:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-16 14:08:12,570 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-16 14:08:12,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:12,570 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-16 14:08:12,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-16 14:08:12,572 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-16 14:08:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:12,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:12,574 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:12,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:12,789 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:12,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:12,789 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-16 14:08:12,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:12,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012071104] [2020-09-16 14:08:12,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:12,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012071104] [2020-09-16 14:08:12,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188850788] [2020-09-16 14:08:12,890 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 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 [2020-09-16 14:08:12,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 14:08:12,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:12,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:12,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:12,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:12,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:12,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-16 14:08:12,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476514373] [2020-09-16 14:08:12,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:12,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:12,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:12,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:12,989 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-16 14:08:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:13,108 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-16 14:08:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 14:08:13,109 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-16 14:08:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:13,110 INFO L225 Difference]: With dead ends: 58 [2020-09-16 14:08:13,110 INFO L226 Difference]: Without dead ends: 52 [2020-09-16 14:08:13,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:13,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-16 14:08:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-16 14:08:13,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-16 14:08:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-16 14:08:13,115 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-16 14:08:13,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:13,115 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-16 14:08:13,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:13,116 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-16 14:08:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:13,116 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:13,117 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:13,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:13,329 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:13,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:13,329 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-16 14:08:13,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:13,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433369310] [2020-09-16 14:08:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:13,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433369310] [2020-09-16 14:08:13,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552393246] [2020-09-16 14:08:13,413 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 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 [2020-09-16 14:08:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:13,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:13,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:13,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:13,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-16 14:08:13,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741692243] [2020-09-16 14:08:13,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-16 14:08:13,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:13,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-16 14:08:13,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-16 14:08:13,485 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-16 14:08:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:13,645 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-16 14:08:13,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:13,646 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-16 14:08:13,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:13,647 INFO L225 Difference]: With dead ends: 78 [2020-09-16 14:08:13,647 INFO L226 Difference]: Without dead ends: 72 [2020-09-16 14:08:13,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:13,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-16 14:08:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-16 14:08:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-16 14:08:13,653 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-16 14:08:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:13,653 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-16 14:08:13,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-16 14:08:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-16 14:08:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 14:08:13,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:13,654 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:13,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:13,868 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:13,868 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-16 14:08:13,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:13,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903100518] [2020-09-16 14:08:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:13,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903100518] [2020-09-16 14:08:13,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456178631] [2020-09-16 14:08:13,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:08:14,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:14,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:14,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 14:08:14,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:14,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:14,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:14,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-16 14:08:14,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852643721] [2020-09-16 14:08:14,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:14,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:14,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:14,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:14,096 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-16 14:08:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:14,270 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-16 14:08:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 14:08:14,271 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-16 14:08:14,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:14,272 INFO L225 Difference]: With dead ends: 62 [2020-09-16 14:08:14,272 INFO L226 Difference]: Without dead ends: 54 [2020-09-16 14:08:14,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-16 14:08:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-16 14:08:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-16 14:08:14,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-16 14:08:14,277 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-16 14:08:14,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:14,277 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-16 14:08:14,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:14,277 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-16 14:08:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:14,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:14,278 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:14,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-16 14:08:14,490 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:14,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:14,490 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-16 14:08:14,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:14,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654022649] [2020-09-16 14:08:14,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:14,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654022649] [2020-09-16 14:08:14,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626391975] [2020-09-16 14:08:14,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:14,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 14:08:14,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:14,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:14,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:14,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:14,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-16 14:08:14,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552031586] [2020-09-16 14:08:14,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:14,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:14,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:14,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:14,656 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-16 14:08:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:14,784 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-16 14:08:14,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 14:08:14,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-16 14:08:14,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:14,786 INFO L225 Difference]: With dead ends: 64 [2020-09-16 14:08:14,786 INFO L226 Difference]: Without dead ends: 58 [2020-09-16 14:08:14,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-16 14:08:14,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-16 14:08:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-16 14:08:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-16 14:08:14,792 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-16 14:08:14,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:14,793 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-16 14:08:14,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:14,793 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-16 14:08:14,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:14,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:14,794 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:14,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:14,998 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:14,999 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-16 14:08:14,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:14,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064424881] [2020-09-16 14:08:14,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:15,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064424881] [2020-09-16 14:08:15,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704096547] [2020-09-16 14:08:15,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:15,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:15,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:15,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:15,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:15,147 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:15,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:15,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-16 14:08:15,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798520160] [2020-09-16 14:08:15,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:15,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:15,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:15,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:15,161 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-16 14:08:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:15,364 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-16 14:08:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 14:08:15,365 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-16 14:08:15,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:15,366 INFO L225 Difference]: With dead ends: 61 [2020-09-16 14:08:15,366 INFO L226 Difference]: Without dead ends: 55 [2020-09-16 14:08:15,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:08:15,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-16 14:08:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-16 14:08:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-16 14:08:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-16 14:08:15,371 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-16 14:08:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:15,372 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-16 14:08:15,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:15,372 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-16 14:08:15,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:15,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:15,373 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:15,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:15,585 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:15,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:15,586 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-16 14:08:15,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:15,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766139676] [2020-09-16 14:08:15,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:15,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766139676] [2020-09-16 14:08:15,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162411639] [2020-09-16 14:08:15,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:08:15,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:15,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:15,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:15,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:15,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:15,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-16 14:08:15,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994656451] [2020-09-16 14:08:15,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 14:08:15,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:15,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 14:08:15,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-16 14:08:15,755 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-16 14:08:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:15,920 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-16 14:08:15,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:15,920 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-16 14:08:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:15,921 INFO L225 Difference]: With dead ends: 77 [2020-09-16 14:08:15,921 INFO L226 Difference]: Without dead ends: 71 [2020-09-16 14:08:15,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-16 14:08:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-16 14:08:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-16 14:08:15,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-16 14:08:15,926 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-16 14:08:15,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:15,927 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-16 14:08:15,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 14:08:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-16 14:08:15,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:15,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:15,928 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:16,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-16 14:08:16,139 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:16,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:16,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-16 14:08:16,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:16,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043502144] [2020-09-16 14:08:16,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:16,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043502144] [2020-09-16 14:08:16,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956407771] [2020-09-16 14:08:16,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:16,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 14:08:16,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:16,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:16,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:16,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:16,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:16,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-16 14:08:16,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881448363] [2020-09-16 14:08:16,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:16,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:16,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:16,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:16,312 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-16 14:08:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:16,580 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-09-16 14:08:16,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:08:16,581 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-16 14:08:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:16,582 INFO L225 Difference]: With dead ends: 58 [2020-09-16 14:08:16,582 INFO L226 Difference]: Without dead ends: 50 [2020-09-16 14:08:16,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:08:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-16 14:08:16,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-09-16 14:08:16,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-16 14:08:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-16 14:08:16,585 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-16 14:08:16,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:16,586 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-16 14:08:16,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:16,586 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-16 14:08:16,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 14:08:16,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:16,587 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:16,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:16,797 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:16,797 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-16 14:08:16,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:16,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216564209] [2020-09-16 14:08:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:16,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216564209] [2020-09-16 14:08:16,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038225088] [2020-09-16 14:08:16,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:16,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 14:08:16,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:16,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:16,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:16,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-16 14:08:16,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581364422] [2020-09-16 14:08:16,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:16,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:16,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:16,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:16,974 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-16 14:08:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:17,157 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-16 14:08:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:17,158 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-16 14:08:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:17,159 INFO L225 Difference]: With dead ends: 60 [2020-09-16 14:08:17,159 INFO L226 Difference]: Without dead ends: 55 [2020-09-16 14:08:17,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:08:17,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-16 14:08:17,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-16 14:08:17,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:17,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-16 14:08:17,163 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-16 14:08:17,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:17,163 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-16 14:08:17,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:17,163 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-16 14:08:17,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:17,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:17,164 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:17,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-16 14:08:17,373 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:17,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-16 14:08:17,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:17,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181122231] [2020-09-16 14:08:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:17,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181122231] [2020-09-16 14:08:17,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763466589] [2020-09-16 14:08:17,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:17,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:17,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:17,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:17,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:17,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:17,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:17,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-16 14:08:17,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219557013] [2020-09-16 14:08:17,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:17,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:17,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:17,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:17,571 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-16 14:08:17,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:17,823 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-16 14:08:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:17,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-16 14:08:17,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:17,824 INFO L225 Difference]: With dead ends: 54 [2020-09-16 14:08:17,825 INFO L226 Difference]: Without dead ends: 49 [2020-09-16 14:08:17,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:08:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-16 14:08:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-16 14:08:17,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-16 14:08:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-16 14:08:17,831 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-16 14:08:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:17,832 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-16 14:08:17,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:17,833 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-16 14:08:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:17,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:17,834 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:18,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-16 14:08:18,035 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:18,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:18,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-16 14:08:18,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:18,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178083900] [2020-09-16 14:08:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:18,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178083900] [2020-09-16 14:08:18,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138141811] [2020-09-16 14:08:18,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:18,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:08:18,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:18,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:18,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:18,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:18,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-16 14:08:18,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161321613] [2020-09-16 14:08:18,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:18,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:18,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:18,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:18,194 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-16 14:08:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:18,287 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-16 14:08:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 14:08:18,287 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-16 14:08:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:18,288 INFO L225 Difference]: With dead ends: 60 [2020-09-16 14:08:18,288 INFO L226 Difference]: Without dead ends: 54 [2020-09-16 14:08:18,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-16 14:08:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-16 14:08:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-16 14:08:18,292 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-16 14:08:18,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:18,292 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-16 14:08:18,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:18,292 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-16 14:08:18,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:18,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:18,293 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:18,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-16 14:08:18,501 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:18,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:18,502 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-16 14:08:18,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:18,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876367414] [2020-09-16 14:08:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:18,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876367414] [2020-09-16 14:08:18,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874915057] [2020-09-16 14:08:18,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:18,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:18,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:18,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:18,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:18,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:18,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:18,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-16 14:08:18,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850171146] [2020-09-16 14:08:18,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:18,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:18,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:18,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:18,695 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-16 14:08:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:18,865 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-16 14:08:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 14:08:18,866 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-16 14:08:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:18,866 INFO L225 Difference]: With dead ends: 66 [2020-09-16 14:08:18,866 INFO L226 Difference]: Without dead ends: 60 [2020-09-16 14:08:18,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:08:18,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-16 14:08:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-16 14:08:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-16 14:08:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-16 14:08:18,870 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-16 14:08:18,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:18,871 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-16 14:08:18,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:18,871 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-16 14:08:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:18,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:18,872 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:19,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-16 14:08:19,080 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:19,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:19,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-16 14:08:19,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:19,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675006257] [2020-09-16 14:08:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:19,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675006257] [2020-09-16 14:08:19,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286024289] [2020-09-16 14:08:19,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:19,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:08:19,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:19,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:19,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:19,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:19,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-16 14:08:19,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251268607] [2020-09-16 14:08:19,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:19,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:19,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:19,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:19,268 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-16 14:08:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:19,482 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-16 14:08:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:08:19,483 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-16 14:08:19,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:19,484 INFO L225 Difference]: With dead ends: 67 [2020-09-16 14:08:19,484 INFO L226 Difference]: Without dead ends: 61 [2020-09-16 14:08:19,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:08:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-16 14:08:19,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-16 14:08:19,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-16 14:08:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-16 14:08:19,487 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-16 14:08:19,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:19,487 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-16 14:08:19,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:19,487 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-16 14:08:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:19,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:19,488 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:19,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:19,696 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-16 14:08:19,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:19,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629014550] [2020-09-16 14:08:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:19,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629014550] [2020-09-16 14:08:19,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191214278] [2020-09-16 14:08:19,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:19,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:08:19,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:19,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:19,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:19,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:19,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:19,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-16 14:08:19,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670700827] [2020-09-16 14:08:19,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:19,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:19,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:19,881 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-16 14:08:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:20,143 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-16 14:08:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:08:20,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-16 14:08:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:20,145 INFO L225 Difference]: With dead ends: 69 [2020-09-16 14:08:20,145 INFO L226 Difference]: Without dead ends: 63 [2020-09-16 14:08:20,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:08:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-16 14:08:20,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-16 14:08:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-16 14:08:20,148 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-16 14:08:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:20,148 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-16 14:08:20,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-16 14:08:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:20,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:20,149 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:20,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:20,358 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:20,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:20,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-16 14:08:20,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:20,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312217523] [2020-09-16 14:08:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:20,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312217523] [2020-09-16 14:08:20,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927104126] [2020-09-16 14:08:20,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:20,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:20,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:20,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:20,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-16 14:08:20,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527041628] [2020-09-16 14:08:20,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 14:08:20,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:20,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 14:08:20,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-16 14:08:20,504 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-16 14:08:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:20,721 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-16 14:08:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:20,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-16 14:08:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:20,723 INFO L225 Difference]: With dead ends: 88 [2020-09-16 14:08:20,723 INFO L226 Difference]: Without dead ends: 82 [2020-09-16 14:08:20,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:08:20,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-16 14:08:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-16 14:08:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-16 14:08:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-16 14:08:20,727 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-16 14:08:20,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:20,727 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-16 14:08:20,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 14:08:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-16 14:08:20,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 14:08:20,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:20,728 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:20,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:20,938 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:20,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:20,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-16 14:08:20,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:20,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679893065] [2020-09-16 14:08:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:21,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679893065] [2020-09-16 14:08:21,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462880923] [2020-09-16 14:08:21,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:08:21,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:21,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:21,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 14:08:21,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:21,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:21,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:21,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-16 14:08:21,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570558014] [2020-09-16 14:08:21,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:21,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:21,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:21,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:21,086 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-16 14:08:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:21,415 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-16 14:08:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:21,420 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-16 14:08:21,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:21,421 INFO L225 Difference]: With dead ends: 69 [2020-09-16 14:08:21,421 INFO L226 Difference]: Without dead ends: 61 [2020-09-16 14:08:21,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:08:21,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-16 14:08:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-16 14:08:21,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-16 14:08:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-16 14:08:21,424 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-16 14:08:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:21,424 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-16 14:08:21,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-16 14:08:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:21,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:21,425 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:21,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-16 14:08:21,632 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:21,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:21,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-16 14:08:21,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:21,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518901434] [2020-09-16 14:08:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:21,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518901434] [2020-09-16 14:08:21,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18626453] [2020-09-16 14:08:21,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:21,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:08:21,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:21,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:21,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:21,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:21,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-16 14:08:21,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223188561] [2020-09-16 14:08:21,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:21,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:21,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:21,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:21,796 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-16 14:08:21,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:21,951 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-16 14:08:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:21,951 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-16 14:08:21,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:21,952 INFO L225 Difference]: With dead ends: 74 [2020-09-16 14:08:21,952 INFO L226 Difference]: Without dead ends: 68 [2020-09-16 14:08:21,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:08:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-16 14:08:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-16 14:08:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-16 14:08:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-16 14:08:21,955 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-16 14:08:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:21,956 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-16 14:08:21,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-16 14:08:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:21,956 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:21,957 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:22,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-16 14:08:22,165 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:22,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:22,166 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-16 14:08:22,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:22,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779806904] [2020-09-16 14:08:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:22,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779806904] [2020-09-16 14:08:22,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921901325] [2020-09-16 14:08:22,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:22,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:22,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:22,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:22,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:22,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:22,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:22,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-16 14:08:22,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109827732] [2020-09-16 14:08:22,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:22,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:22,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:22,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:22,361 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-16 14:08:22,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:22,613 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-16 14:08:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:08:22,614 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-16 14:08:22,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:22,615 INFO L225 Difference]: With dead ends: 71 [2020-09-16 14:08:22,615 INFO L226 Difference]: Without dead ends: 65 [2020-09-16 14:08:22,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:08:22,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-16 14:08:22,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-16 14:08:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 14:08:22,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-16 14:08:22,619 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-16 14:08:22,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:22,620 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-16 14:08:22,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-16 14:08:22,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:22,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:22,621 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:22,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-16 14:08:22,831 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:22,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:22,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-16 14:08:22,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:22,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591882088] [2020-09-16 14:08:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:22,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591882088] [2020-09-16 14:08:22,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80338448] [2020-09-16 14:08:22,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:22,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:08:22,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:22,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:22,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:22,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:22,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-16 14:08:22,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096972337] [2020-09-16 14:08:22,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:22,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:22,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:22,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:22,986 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-16 14:08:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:23,194 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-16 14:08:23,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:08:23,194 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-16 14:08:23,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:23,195 INFO L225 Difference]: With dead ends: 68 [2020-09-16 14:08:23,196 INFO L226 Difference]: Without dead ends: 62 [2020-09-16 14:08:23,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:08:23,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-16 14:08:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-16 14:08:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-16 14:08:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-16 14:08:23,200 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-16 14:08:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:23,201 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-16 14:08:23,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-16 14:08:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:23,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:23,202 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:23,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-16 14:08:23,414 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:23,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:23,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-16 14:08:23,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:23,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634280705] [2020-09-16 14:08:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:23,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634280705] [2020-09-16 14:08:23,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668522188] [2020-09-16 14:08:23,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:08:23,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:08:23,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:23,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:23,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:23,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:23,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:23,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-16 14:08:23,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64884546] [2020-09-16 14:08:23,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:23,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:23,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:23,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:23,606 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-16 14:08:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:23,935 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-16 14:08:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:23,936 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-16 14:08:23,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:23,937 INFO L225 Difference]: With dead ends: 67 [2020-09-16 14:08:23,937 INFO L226 Difference]: Without dead ends: 61 [2020-09-16 14:08:23,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:08:23,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-16 14:08:23,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-16 14:08:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 14:08:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-16 14:08:23,940 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-16 14:08:23,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:23,940 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-16 14:08:23,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:23,941 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-16 14:08:23,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:23,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:23,941 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:24,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-16 14:08:24,142 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:24,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:24,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-16 14:08:24,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:24,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014360607] [2020-09-16 14:08:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:24,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014360607] [2020-09-16 14:08:24,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767422165] [2020-09-16 14:08:24,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:08:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:24,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:24,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:24,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:24,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-16 14:08:24,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045983420] [2020-09-16 14:08:24,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 14:08:24,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:24,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 14:08:24,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-16 14:08:24,311 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-16 14:08:24,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:24,582 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-16 14:08:24,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:24,583 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-16 14:08:24,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:24,584 INFO L225 Difference]: With dead ends: 83 [2020-09-16 14:08:24,584 INFO L226 Difference]: Without dead ends: 77 [2020-09-16 14:08:24,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:08:24,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-16 14:08:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-16 14:08:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-16 14:08:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-16 14:08:24,589 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-16 14:08:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:24,589 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-16 14:08:24,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 14:08:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-16 14:08:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:24,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:24,590 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:24,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:24,801 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:24,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:24,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-16 14:08:24,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:24,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333671777] [2020-09-16 14:08:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:24,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333671777] [2020-09-16 14:08:24,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570507267] [2020-09-16 14:08:24,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:24,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:24,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:24,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:24,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:24,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:24,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-16 14:08:24,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916481435] [2020-09-16 14:08:24,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:24,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:24,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:24,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:24,976 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-16 14:08:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:25,304 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-09-16 14:08:25,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:25,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-16 14:08:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:25,306 INFO L225 Difference]: With dead ends: 62 [2020-09-16 14:08:25,306 INFO L226 Difference]: Without dead ends: 54 [2020-09-16 14:08:25,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:08:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-16 14:08:25,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-09-16 14:08:25,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-16 14:08:25,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-16 14:08:25,310 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-16 14:08:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:25,310 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-16 14:08:25,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-16 14:08:25,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:08:25,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:25,311 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:25,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-16 14:08:25,513 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:25,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:25,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-16 14:08:25,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:25,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117636167] [2020-09-16 14:08:25,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:25,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117636167] [2020-09-16 14:08:25,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401468414] [2020-09-16 14:08:25,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:25,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:08:25,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:25,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 14:08:25,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:25,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:25,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:25,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-16 14:08:25,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076373762] [2020-09-16 14:08:25,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:25,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:25,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:25,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:25,716 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-16 14:08:26,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:26,006 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-16 14:08:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:26,007 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-16 14:08:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:26,008 INFO L225 Difference]: With dead ends: 68 [2020-09-16 14:08:26,008 INFO L226 Difference]: Without dead ends: 63 [2020-09-16 14:08:26,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:08:26,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-16 14:08:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-16 14:08:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-16 14:08:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-16 14:08:26,013 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-16 14:08:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:26,014 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-16 14:08:26,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-16 14:08:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:26,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:26,014 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:26,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-16 14:08:26,215 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:26,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-16 14:08:26,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:26,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662139370] [2020-09-16 14:08:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:26,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662139370] [2020-09-16 14:08:26,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538231790] [2020-09-16 14:08:26,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:26,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:26,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:26,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:26,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:26,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:26,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:26,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66908362] [2020-09-16 14:08:26,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:26,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:26,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:26,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:26,406 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-16 14:08:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:26,753 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-16 14:08:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:26,753 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:26,754 INFO L225 Difference]: With dead ends: 60 [2020-09-16 14:08:26,754 INFO L226 Difference]: Without dead ends: 55 [2020-09-16 14:08:26,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:08:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-16 14:08:26,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-16 14:08:26,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-16 14:08:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-16 14:08:26,758 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-16 14:08:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:26,759 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-16 14:08:26,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-16 14:08:26,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:26,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:26,759 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:26,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:26,970 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:26,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-16 14:08:26,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:26,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907090931] [2020-09-16 14:08:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:27,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907090931] [2020-09-16 14:08:27,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533428353] [2020-09-16 14:08:27,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:27,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:08:27,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:27,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:27,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:27,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:27,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-16 14:08:27,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36201095] [2020-09-16 14:08:27,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:27,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:27,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:27,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:27,177 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-16 14:08:27,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:27,338 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-16 14:08:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:08:27,339 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-16 14:08:27,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:27,339 INFO L225 Difference]: With dead ends: 66 [2020-09-16 14:08:27,339 INFO L226 Difference]: Without dead ends: 60 [2020-09-16 14:08:27,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:08:27,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-16 14:08:27,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-16 14:08:27,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 14:08:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-16 14:08:27,343 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-16 14:08:27,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:27,343 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-16 14:08:27,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:27,343 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-16 14:08:27,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:27,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:27,345 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:27,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:27,553 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:27,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:27,554 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-16 14:08:27,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:27,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690076800] [2020-09-16 14:08:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:27,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690076800] [2020-09-16 14:08:27,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403621136] [2020-09-16 14:08:27,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:27,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 14:08:27,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:27,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:27,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:27,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:27,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:27,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:27,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241837505] [2020-09-16 14:08:27,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:27,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:27,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:27,795 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-16 14:08:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:28,038 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-16 14:08:28,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:08:28,039 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:28,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:28,040 INFO L225 Difference]: With dead ends: 74 [2020-09-16 14:08:28,040 INFO L226 Difference]: Without dead ends: 68 [2020-09-16 14:08:28,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:08:28,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-16 14:08:28,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-16 14:08:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-16 14:08:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-16 14:08:28,042 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-16 14:08:28,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:28,042 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-16 14:08:28,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:28,043 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-16 14:08:28,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:28,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:28,043 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:28,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-16 14:08:28,244 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:28,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:28,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-16 14:08:28,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:28,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645139522] [2020-09-16 14:08:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:28,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645139522] [2020-09-16 14:08:28,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135556296] [2020-09-16 14:08:28,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:28,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:28,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:28,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:28,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-16 14:08:28,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995304468] [2020-09-16 14:08:28,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:28,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:28,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:28,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:28,422 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-16 14:08:28,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:28,676 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-16 14:08:28,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:28,677 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-16 14:08:28,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:28,678 INFO L225 Difference]: With dead ends: 75 [2020-09-16 14:08:28,678 INFO L226 Difference]: Without dead ends: 69 [2020-09-16 14:08:28,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:08:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-16 14:08:28,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-16 14:08:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-16 14:08:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-16 14:08:28,681 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-16 14:08:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:28,682 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-16 14:08:28,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:28,682 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-16 14:08:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:28,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:28,682 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:28,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:28,891 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:28,892 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-16 14:08:28,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:28,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493632985] [2020-09-16 14:08:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:28,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493632985] [2020-09-16 14:08:28,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540034539] [2020-09-16 14:08:28,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:29,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:29,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:29,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:29,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:29,071 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:29,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:29,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:29,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251780215] [2020-09-16 14:08:29,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:29,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:29,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:29,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:29,086 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-16 14:08:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:29,389 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-16 14:08:29,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:29,390 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:29,391 INFO L225 Difference]: With dead ends: 79 [2020-09-16 14:08:29,391 INFO L226 Difference]: Without dead ends: 73 [2020-09-16 14:08:29,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:08:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-16 14:08:29,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-16 14:08:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 14:08:29,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-16 14:08:29,394 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-16 14:08:29,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:29,394 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-16 14:08:29,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-16 14:08:29,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:29,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:29,395 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:29,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-16 14:08:29,597 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:29,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:29,597 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-16 14:08:29,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:29,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213026536] [2020-09-16 14:08:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:29,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213026536] [2020-09-16 14:08:29,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484062792] [2020-09-16 14:08:29,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:29,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 14:08:29,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:29,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:29,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:29,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:29,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-16 14:08:29,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799136490] [2020-09-16 14:08:29,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:29,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:29,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:29,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:29,757 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-16 14:08:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:30,072 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-16 14:08:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:08:30,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-16 14:08:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:30,074 INFO L225 Difference]: With dead ends: 79 [2020-09-16 14:08:30,074 INFO L226 Difference]: Without dead ends: 73 [2020-09-16 14:08:30,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:08:30,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-16 14:08:30,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-16 14:08:30,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-16 14:08:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-16 14:08:30,077 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-16 14:08:30,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:30,077 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-16 14:08:30,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:30,078 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-16 14:08:30,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:30,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:30,078 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:30,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:30,286 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:30,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:30,286 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-16 14:08:30,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:30,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950574943] [2020-09-16 14:08:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:30,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950574943] [2020-09-16 14:08:30,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056917481] [2020-09-16 14:08:30,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:30,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:30,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:30,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:30,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:30,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:30,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:30,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:30,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120399973] [2020-09-16 14:08:30,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:30,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:30,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:30,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:30,485 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-16 14:08:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:30,896 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-16 14:08:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:08:30,897 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:30,898 INFO L225 Difference]: With dead ends: 76 [2020-09-16 14:08:30,898 INFO L226 Difference]: Without dead ends: 70 [2020-09-16 14:08:30,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:08:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-16 14:08:30,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-16 14:08:30,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-16 14:08:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-16 14:08:30,903 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-16 14:08:30,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:30,903 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-16 14:08:30,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-16 14:08:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:30,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:30,905 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:31,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-16 14:08:31,115 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:31,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:31,116 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-16 14:08:31,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:31,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667821310] [2020-09-16 14:08:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:31,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667821310] [2020-09-16 14:08:31,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844997257] [2020-09-16 14:08:31,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:31,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:08:31,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:31,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:31,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:31,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:31,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-16 14:08:31,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422511616] [2020-09-16 14:08:31,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 14:08:31,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:31,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 14:08:31,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-16 14:08:31,337 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-16 14:08:31,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:31,688 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-16 14:08:31,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:31,688 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-16 14:08:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:31,689 INFO L225 Difference]: With dead ends: 96 [2020-09-16 14:08:31,689 INFO L226 Difference]: Without dead ends: 90 [2020-09-16 14:08:31,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:08:31,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-16 14:08:31,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-16 14:08:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-16 14:08:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-16 14:08:31,692 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-16 14:08:31,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:31,693 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-16 14:08:31,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 14:08:31,693 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-16 14:08:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:08:31,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:31,693 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:31,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-16 14:08:31,901 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:31,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:31,902 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-16 14:08:31,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:31,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165879857] [2020-09-16 14:08:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:32,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165879857] [2020-09-16 14:08:32,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878498427] [2020-09-16 14:08:32,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:32,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 14:08:32,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:32,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:08:32,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:32,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:32,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:32,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-16 14:08:32,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239803592] [2020-09-16 14:08:32,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:32,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:32,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:32,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:32,106 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-16 14:08:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:32,548 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-16 14:08:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:08:32,549 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-16 14:08:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:32,550 INFO L225 Difference]: With dead ends: 77 [2020-09-16 14:08:32,550 INFO L226 Difference]: Without dead ends: 69 [2020-09-16 14:08:32,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:08:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-16 14:08:32,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-16 14:08:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-16 14:08:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-16 14:08:32,553 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-16 14:08:32,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:32,553 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-16 14:08:32,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:32,553 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-16 14:08:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:32,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:32,554 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:32,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-16 14:08:32,761 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:32,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:32,762 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-16 14:08:32,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:32,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153681356] [2020-09-16 14:08:32,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:32,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153681356] [2020-09-16 14:08:32,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055662629] [2020-09-16 14:08:32,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:32,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:32,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:32,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:32,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-16 14:08:32,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127058967] [2020-09-16 14:08:32,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:32,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:32,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:32,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:32,963 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-16 14:08:33,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:33,179 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-16 14:08:33,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:08:33,180 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-16 14:08:33,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:33,181 INFO L225 Difference]: With dead ends: 84 [2020-09-16 14:08:33,181 INFO L226 Difference]: Without dead ends: 78 [2020-09-16 14:08:33,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:08:33,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-16 14:08:33,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-16 14:08:33,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-16 14:08:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-16 14:08:33,184 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-16 14:08:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:33,185 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-16 14:08:33,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-16 14:08:33,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:33,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:33,186 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:33,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-16 14:08:33,394 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:33,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:33,395 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-16 14:08:33,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:33,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270400279] [2020-09-16 14:08:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:33,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270400279] [2020-09-16 14:08:33,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236872603] [2020-09-16 14:08:33,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:33,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:33,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:33,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:33,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:33,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:33,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:33,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:33,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440715711] [2020-09-16 14:08:33,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:33,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:33,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:33,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:33,614 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-16 14:08:33,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:33,914 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-16 14:08:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:33,919 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:33,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:33,920 INFO L225 Difference]: With dead ends: 81 [2020-09-16 14:08:33,920 INFO L226 Difference]: Without dead ends: 75 [2020-09-16 14:08:33,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:08:33,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-16 14:08:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-16 14:08:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-16 14:08:33,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-16 14:08:33,927 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-16 14:08:33,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:33,927 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-16 14:08:33,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:33,927 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-16 14:08:33,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:33,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:33,929 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:34,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-16 14:08:34,139 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:34,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:34,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-16 14:08:34,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:34,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226103558] [2020-09-16 14:08:34,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:34,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226103558] [2020-09-16 14:08:34,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918376123] [2020-09-16 14:08:34,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:08:34,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 14:08:34,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:34,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:34,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:34,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-16 14:08:34,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852345523] [2020-09-16 14:08:34,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:34,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:34,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:34,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:34,379 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-16 14:08:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:34,678 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-16 14:08:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:34,679 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-16 14:08:34,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:34,679 INFO L225 Difference]: With dead ends: 78 [2020-09-16 14:08:34,679 INFO L226 Difference]: Without dead ends: 72 [2020-09-16 14:08:34,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:08:34,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-16 14:08:34,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-16 14:08:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-16 14:08:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-16 14:08:34,683 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-16 14:08:34,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:34,683 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-16 14:08:34,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:34,683 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-16 14:08:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:34,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:34,684 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:34,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-16 14:08:34,895 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:34,907 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-16 14:08:34,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:34,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417887516] [2020-09-16 14:08:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:35,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417887516] [2020-09-16 14:08:35,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537253235] [2020-09-16 14:08:35,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:35,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:35,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:35,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:35,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:35,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:35,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:35,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496894157] [2020-09-16 14:08:35,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:35,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:35,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:35,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:35,120 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-16 14:08:35,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:35,469 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-16 14:08:35,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:08:35,473 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:35,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:35,474 INFO L225 Difference]: With dead ends: 77 [2020-09-16 14:08:35,474 INFO L226 Difference]: Without dead ends: 71 [2020-09-16 14:08:35,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:08:35,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-16 14:08:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-16 14:08:35,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-16 14:08:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-16 14:08:35,477 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-16 14:08:35,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:35,477 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-16 14:08:35,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:35,481 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-16 14:08:35,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:35,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:35,481 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:35,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-16 14:08:35,682 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:35,683 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-16 14:08:35,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:35,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810474455] [2020-09-16 14:08:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:35,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810474455] [2020-09-16 14:08:35,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792571158] [2020-09-16 14:08:35,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:35,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:08:35,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:35,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:35,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:35,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:35,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-16 14:08:35,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048048228] [2020-09-16 14:08:35,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:35,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:35,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:35,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:35,912 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-16 14:08:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:36,224 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-16 14:08:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:08:36,224 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-16 14:08:36,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:36,225 INFO L225 Difference]: With dead ends: 74 [2020-09-16 14:08:36,225 INFO L226 Difference]: Without dead ends: 68 [2020-09-16 14:08:36,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:08:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-16 14:08:36,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-16 14:08:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-16 14:08:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-16 14:08:36,228 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-16 14:08:36,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:36,229 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-16 14:08:36,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:36,229 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-16 14:08:36,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:36,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:36,230 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:36,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:36,437 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:36,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:36,438 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-16 14:08:36,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:36,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177497566] [2020-09-16 14:08:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:36,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177497566] [2020-09-16 14:08:36,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923699511] [2020-09-16 14:08:36,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:36,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 14:08:36,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:36,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:36,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:36,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:36,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:36,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:36,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281600354] [2020-09-16 14:08:36,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:36,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:36,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:36,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:36,640 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-16 14:08:37,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:37,140 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-16 14:08:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:08:37,141 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:37,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:37,167 INFO L225 Difference]: With dead ends: 73 [2020-09-16 14:08:37,167 INFO L226 Difference]: Without dead ends: 67 [2020-09-16 14:08:37,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:08:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-16 14:08:37,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-16 14:08:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-16 14:08:37,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-16 14:08:37,170 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-16 14:08:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:37,170 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-16 14:08:37,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:37,171 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-16 14:08:37,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:37,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:37,171 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:37,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-16 14:08:37,372 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:37,373 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-16 14:08:37,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:37,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312306314] [2020-09-16 14:08:37,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:37,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312306314] [2020-09-16 14:08:37,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401542304] [2020-09-16 14:08:37,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:37,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:37,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:37,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:37,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-16 14:08:37,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865082553] [2020-09-16 14:08:37,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 14:08:37,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:37,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 14:08:37,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-16 14:08:37,538 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-16 14:08:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:37,919 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-16 14:08:37,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:37,923 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-16 14:08:37,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:37,924 INFO L225 Difference]: With dead ends: 89 [2020-09-16 14:08:37,924 INFO L226 Difference]: Without dead ends: 83 [2020-09-16 14:08:37,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:08:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-16 14:08:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-16 14:08:37,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-16 14:08:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-16 14:08:37,928 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-16 14:08:37,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:37,928 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-16 14:08:37,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 14:08:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-16 14:08:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:37,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:37,929 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:38,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:38,130 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:38,131 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-16 14:08:38,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:38,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21800177] [2020-09-16 14:08:38,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:38,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21800177] [2020-09-16 14:08:38,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050774762] [2020-09-16 14:08:38,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:38,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:38,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:38,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:38,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:38,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:38,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:38,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:38,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91345696] [2020-09-16 14:08:38,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:38,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:38,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:38,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:38,313 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-16 14:08:38,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:38,824 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-09-16 14:08:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 14:08:38,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:38,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:38,826 INFO L225 Difference]: With dead ends: 70 [2020-09-16 14:08:38,826 INFO L226 Difference]: Without dead ends: 62 [2020-09-16 14:08:38,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-09-16 14:08:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-16 14:08:38,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-09-16 14:08:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-16 14:08:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-16 14:08:38,830 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-16 14:08:38,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:38,830 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-16 14:08:38,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-16 14:08:38,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-16 14:08:38,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:38,831 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:39,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-16 14:08:39,035 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:39,036 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-16 14:08:39,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:39,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299853132] [2020-09-16 14:08:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:39,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299853132] [2020-09-16 14:08:39,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688837882] [2020-09-16 14:08:39,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:39,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 14:08:39,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:39,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:08:39,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:39,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:39,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:39,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-16 14:08:39,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388855752] [2020-09-16 14:08:39,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:39,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:39,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:39,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:39,249 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-16 14:08:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:39,744 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-16 14:08:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:39,744 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-16 14:08:39,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:39,745 INFO L225 Difference]: With dead ends: 76 [2020-09-16 14:08:39,745 INFO L226 Difference]: Without dead ends: 71 [2020-09-16 14:08:39,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-16 14:08:39,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-16 14:08:39,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-16 14:08:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-16 14:08:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-16 14:08:39,748 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-16 14:08:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:39,748 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-16 14:08:39,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-16 14:08:39,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:39,749 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:39,749 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:39,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:39,953 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:39,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:39,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-16 14:08:39,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:39,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21809057] [2020-09-16 14:08:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:40,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21809057] [2020-09-16 14:08:40,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035966765] [2020-09-16 14:08:40,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:40,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:40,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:40,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:40,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:40,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:40,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:40,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:40,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363698950] [2020-09-16 14:08:40,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:40,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:40,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:40,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:40,163 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-16 14:08:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:40,652 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-16 14:08:40,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:40,653 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:40,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:40,654 INFO L225 Difference]: With dead ends: 66 [2020-09-16 14:08:40,654 INFO L226 Difference]: Without dead ends: 61 [2020-09-16 14:08:40,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:08:40,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-16 14:08:40,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-16 14:08:40,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-16 14:08:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-16 14:08:40,657 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-16 14:08:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:40,657 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-16 14:08:40,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:40,658 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-16 14:08:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:40,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:40,658 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:40,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-16 14:08:40,867 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:40,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:40,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-16 14:08:40,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:40,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755636859] [2020-09-16 14:08:40,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:41,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755636859] [2020-09-16 14:08:41,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241419213] [2020-09-16 14:08:41,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:41,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-16 14:08:41,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:41,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:41,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:41,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:41,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:41,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038201924] [2020-09-16 14:08:41,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:41,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:41,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:41,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:41,105 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-16 14:08:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:41,326 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-16 14:08:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:08:41,327 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:41,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:41,328 INFO L225 Difference]: With dead ends: 72 [2020-09-16 14:08:41,328 INFO L226 Difference]: Without dead ends: 66 [2020-09-16 14:08:41,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:08:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-16 14:08:41,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-16 14:08:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-16 14:08:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-16 14:08:41,334 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-16 14:08:41,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:41,334 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-16 14:08:41,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-16 14:08:41,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:41,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:41,337 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:41,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-16 14:08:41,546 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:41,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:41,547 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-16 14:08:41,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:41,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405778535] [2020-09-16 14:08:41,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:41,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405778535] [2020-09-16 14:08:41,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971072195] [2020-09-16 14:08:41,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:41,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-16 14:08:41,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:41,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:41,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:41,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:41,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:41,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:41,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257109399] [2020-09-16 14:08:41,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:41,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:41,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:41,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:41,765 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-16 14:08:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:42,053 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-16 14:08:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:08:42,054 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:42,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:42,055 INFO L225 Difference]: With dead ends: 82 [2020-09-16 14:08:42,055 INFO L226 Difference]: Without dead ends: 76 [2020-09-16 14:08:42,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:08:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-16 14:08:42,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-16 14:08:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-16 14:08:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-16 14:08:42,059 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-16 14:08:42,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:42,059 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-16 14:08:42,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:42,059 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-16 14:08:42,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:42,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:42,060 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:42,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-16 14:08:42,266 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:42,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:42,267 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-16 14:08:42,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:42,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534177602] [2020-09-16 14:08:42,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:42,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534177602] [2020-09-16 14:08:42,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994155917] [2020-09-16 14:08:42,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:42,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:42,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:42,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:42,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:42,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406923363] [2020-09-16 14:08:42,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:42,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:42,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:42,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:42,524 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-16 14:08:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:42,812 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-16 14:08:42,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:08:42,813 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:42,814 INFO L225 Difference]: With dead ends: 83 [2020-09-16 14:08:42,814 INFO L226 Difference]: Without dead ends: 77 [2020-09-16 14:08:42,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:08:42,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-16 14:08:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-16 14:08:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-16 14:08:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-16 14:08:42,817 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-16 14:08:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:42,817 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-16 14:08:42,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-16 14:08:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:42,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:42,818 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:43,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-16 14:08:43,019 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:43,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:43,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-16 14:08:43,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:43,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606291616] [2020-09-16 14:08:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:43,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606291616] [2020-09-16 14:08:43,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508540963] [2020-09-16 14:08:43,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:43,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:43,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:43,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:43,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:43,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:43,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:43,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:43,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284538733] [2020-09-16 14:08:43,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:43,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:43,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:43,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:43,284 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-16 14:08:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:43,591 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-16 14:08:43,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:08:43,593 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:43,594 INFO L225 Difference]: With dead ends: 89 [2020-09-16 14:08:43,594 INFO L226 Difference]: Without dead ends: 83 [2020-09-16 14:08:43,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:08:43,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-16 14:08:43,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-16 14:08:43,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-16 14:08:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-16 14:08:43,600 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-16 14:08:43,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:43,600 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-16 14:08:43,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-16 14:08:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:43,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:43,602 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:43,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:43,810 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:43,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-16 14:08:43,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:43,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990116114] [2020-09-16 14:08:43,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:43,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990116114] [2020-09-16 14:08:43,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609079303] [2020-09-16 14:08:43,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:43,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-16 14:08:43,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:43,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:43,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:44,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:44,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:44,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134581639] [2020-09-16 14:08:44,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:44,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:44,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:44,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:44,007 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-16 14:08:44,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:44,376 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-16 14:08:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:44,376 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:44,378 INFO L225 Difference]: With dead ends: 89 [2020-09-16 14:08:44,378 INFO L226 Difference]: Without dead ends: 83 [2020-09-16 14:08:44,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:08:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-16 14:08:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-16 14:08:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-16 14:08:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-16 14:08:44,381 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-16 14:08:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:44,381 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-16 14:08:44,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:44,381 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-16 14:08:44,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:44,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:44,382 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:44,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:44,592 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:44,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:44,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-16 14:08:44,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:44,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077317872] [2020-09-16 14:08:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:44,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077317872] [2020-09-16 14:08:44,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468640922] [2020-09-16 14:08:44,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:44,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:44,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:44,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:44,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:44,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:44,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:44,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:44,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63938230] [2020-09-16 14:08:44,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:44,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:44,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:44,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:44,804 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-16 14:08:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:45,270 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-16 14:08:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:08:45,271 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:45,271 INFO L225 Difference]: With dead ends: 86 [2020-09-16 14:08:45,271 INFO L226 Difference]: Without dead ends: 80 [2020-09-16 14:08:45,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:08:45,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-16 14:08:45,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-16 14:08:45,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-16 14:08:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-16 14:08:45,275 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-16 14:08:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:45,275 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-16 14:08:45,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-16 14:08:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:45,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:45,276 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:45,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-16 14:08:45,483 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:45,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:45,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-16 14:08:45,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:45,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519043375] [2020-09-16 14:08:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:45,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519043375] [2020-09-16 14:08:45,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621056520] [2020-09-16 14:08:45,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:45,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-16 14:08:45,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:45,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:45,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:45,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:45,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:45,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863098947] [2020-09-16 14:08:45,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:45,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:45,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:45,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:45,697 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-16 14:08:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:46,111 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-16 14:08:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 14:08:46,111 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:46,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:46,112 INFO L225 Difference]: With dead ends: 87 [2020-09-16 14:08:46,113 INFO L226 Difference]: Without dead ends: 81 [2020-09-16 14:08:46,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-16 14:08:46,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-16 14:08:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-16 14:08:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-16 14:08:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-16 14:08:46,116 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-16 14:08:46,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:46,116 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-16 14:08:46,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:46,116 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-16 14:08:46,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:46,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:46,117 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:46,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:46,318 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:46,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:46,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-16 14:08:46,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:46,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077866375] [2020-09-16 14:08:46,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:46,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077866375] [2020-09-16 14:08:46,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024419907] [2020-09-16 14:08:46,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:46,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-16 14:08:46,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:46,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:46,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:46,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:46,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:46,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880701540] [2020-09-16 14:08:46,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:46,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:46,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:46,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:46,566 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-16 14:08:47,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:47,058 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-16 14:08:47,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 14:08:47,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:47,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:47,060 INFO L225 Difference]: With dead ends: 84 [2020-09-16 14:08:47,060 INFO L226 Difference]: Without dead ends: 78 [2020-09-16 14:08:47,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:08:47,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-16 14:08:47,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-16 14:08:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-16 14:08:47,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-16 14:08:47,063 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-16 14:08:47,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:47,063 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-16 14:08:47,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:47,063 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-16 14:08:47,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:47,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:47,064 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:47,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-16 14:08:47,264 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:47,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-16 14:08:47,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:47,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477154590] [2020-09-16 14:08:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:47,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477154590] [2020-09-16 14:08:47,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104180006] [2020-09-16 14:08:47,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:47,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:47,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:47,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:47,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-16 14:08:47,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843253729] [2020-09-16 14:08:47,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:08:47,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:47,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:08:47,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-16 14:08:47,471 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-16 14:08:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:47,934 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-16 14:08:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:08:47,935 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-16 14:08:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:47,936 INFO L225 Difference]: With dead ends: 104 [2020-09-16 14:08:47,936 INFO L226 Difference]: Without dead ends: 98 [2020-09-16 14:08:47,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-16 14:08:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-16 14:08:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-16 14:08:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-16 14:08:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-16 14:08:47,939 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-16 14:08:47,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:47,940 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-16 14:08:47,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:08:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-16 14:08:47,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-16 14:08:47,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:47,940 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:48,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-16 14:08:48,150 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:48,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:48,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-16 14:08:48,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:48,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825592486] [2020-09-16 14:08:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:48,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825592486] [2020-09-16 14:08:48,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249894819] [2020-09-16 14:08:48,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:48,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:48,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:48,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 14:08:48,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:48,343 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:48,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:48,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-16 14:08:48,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238086023] [2020-09-16 14:08:48,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:48,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:48,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:48,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:48,356 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-16 14:08:48,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:48,940 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-16 14:08:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:08:48,941 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-16 14:08:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:48,942 INFO L225 Difference]: With dead ends: 85 [2020-09-16 14:08:48,942 INFO L226 Difference]: Without dead ends: 77 [2020-09-16 14:08:48,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 14:08:48,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-16 14:08:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-16 14:08:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-16 14:08:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-16 14:08:48,944 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-16 14:08:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:48,945 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-16 14:08:48,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-16 14:08:48,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:48,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:48,946 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:49,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-16 14:08:49,155 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:49,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-16 14:08:49,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:49,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491888377] [2020-09-16 14:08:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:49,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491888377] [2020-09-16 14:08:49,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820730395] [2020-09-16 14:08:49,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:49,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-16 14:08:49,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:49,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:49,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:49,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:49,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-16 14:08:49,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094739107] [2020-09-16 14:08:49,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:49,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:49,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:49,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:49,374 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-16 14:08:49,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:49,644 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-16 14:08:49,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:08:49,645 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-16 14:08:49,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:49,646 INFO L225 Difference]: With dead ends: 94 [2020-09-16 14:08:49,646 INFO L226 Difference]: Without dead ends: 88 [2020-09-16 14:08:49,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:08:49,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-16 14:08:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-16 14:08:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-16 14:08:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-16 14:08:49,650 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-16 14:08:49,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:49,650 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-16 14:08:49,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-16 14:08:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:49,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:49,652 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:49,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-16 14:08:49,863 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:49,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:49,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-16 14:08:49,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:49,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373683678] [2020-09-16 14:08:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:50,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373683678] [2020-09-16 14:08:50,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160475280] [2020-09-16 14:08:50,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:50,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:50,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:50,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:50,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:50,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:50,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:50,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-16 14:08:50,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560578161] [2020-09-16 14:08:50,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:08:50,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:50,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:08:50,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:50,138 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-16 14:08:50,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:50,465 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-16 14:08:50,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:08:50,466 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-16 14:08:50,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:50,467 INFO L225 Difference]: With dead ends: 91 [2020-09-16 14:08:50,467 INFO L226 Difference]: Without dead ends: 85 [2020-09-16 14:08:50,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:08:50,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-16 14:08:50,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-16 14:08:50,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-16 14:08:50,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-16 14:08:50,470 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-16 14:08:50,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:50,470 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-16 14:08:50,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:08:50,471 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-16 14:08:50,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:50,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:50,471 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:50,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-16 14:08:50,679 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:50,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:50,680 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-16 14:08:50,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:50,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577556140] [2020-09-16 14:08:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:50,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577556140] [2020-09-16 14:08:50,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966402912] [2020-09-16 14:08:50,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:50,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-16 14:08:50,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:50,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:50,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:50,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:50,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-16 14:08:50,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104309733] [2020-09-16 14:08:50,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:50,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:50,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:50,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:50,926 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-16 14:08:51,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:51,264 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-16 14:08:51,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:08:51,265 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-16 14:08:51,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:51,266 INFO L225 Difference]: With dead ends: 88 [2020-09-16 14:08:51,266 INFO L226 Difference]: Without dead ends: 82 [2020-09-16 14:08:51,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:08:51,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-16 14:08:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-16 14:08:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-16 14:08:51,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-16 14:08:51,270 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-16 14:08:51,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:51,270 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-16 14:08:51,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:51,270 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-16 14:08:51,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:51,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:51,271 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:51,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:51,481 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:51,482 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-16 14:08:51,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:51,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768983296] [2020-09-16 14:08:51,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:51,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768983296] [2020-09-16 14:08:51,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631389322] [2020-09-16 14:08:51,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:51,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-16 14:08:51,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:51,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:51,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:51,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:51,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:51,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-16 14:08:51,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484987699] [2020-09-16 14:08:51,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:08:51,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:51,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:08:51,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:51,726 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-16 14:08:52,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:52,183 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-16 14:08:52,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:08:52,183 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-16 14:08:52,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:52,184 INFO L225 Difference]: With dead ends: 87 [2020-09-16 14:08:52,185 INFO L226 Difference]: Without dead ends: 81 [2020-09-16 14:08:52,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-16 14:08:52,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-16 14:08:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-16 14:08:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-16 14:08:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-16 14:08:52,188 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-16 14:08:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:52,189 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-16 14:08:52,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:08:52,189 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-16 14:08:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:52,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:52,189 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:52,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:52,399 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:52,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-16 14:08:52,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:52,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717885414] [2020-09-16 14:08:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:52,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717885414] [2020-09-16 14:08:52,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227261108] [2020-09-16 14:08:52,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:52,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:52,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:52,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:52,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-16 14:08:52,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813258879] [2020-09-16 14:08:52,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:52,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:52,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:52,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:52,630 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-16 14:08:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:52,988 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-16 14:08:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:08:52,988 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-16 14:08:52,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:52,989 INFO L225 Difference]: With dead ends: 84 [2020-09-16 14:08:52,989 INFO L226 Difference]: Without dead ends: 78 [2020-09-16 14:08:52,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:08:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-16 14:08:52,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-16 14:08:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-16 14:08:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-16 14:08:52,992 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-16 14:08:52,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:52,992 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-16 14:08:52,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-16 14:08:52,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:52,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:52,994 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:53,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-16 14:08:53,197 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:53,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:53,197 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-16 14:08:53,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:53,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39693205] [2020-09-16 14:08:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:53,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39693205] [2020-09-16 14:08:53,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388379110] [2020-09-16 14:08:53,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:08:53,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:53,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:53,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:53,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:53,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:53,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-16 14:08:53,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211919544] [2020-09-16 14:08:53,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:08:53,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:53,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:08:53,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:53,441 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-16 14:08:54,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:54,002 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-16 14:08:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 14:08:54,003 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-16 14:08:54,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:54,004 INFO L225 Difference]: With dead ends: 83 [2020-09-16 14:08:54,004 INFO L226 Difference]: Without dead ends: 77 [2020-09-16 14:08:54,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-16 14:08:54,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-16 14:08:54,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-16 14:08:54,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-16 14:08:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-16 14:08:54,007 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-16 14:08:54,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:54,007 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-16 14:08:54,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:08:54,008 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-16 14:08:54,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:54,008 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:54,008 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:54,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:54,211 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:54,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:54,212 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-16 14:08:54,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:54,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840738852] [2020-09-16 14:08:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:54,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840738852] [2020-09-16 14:08:54,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057988008] [2020-09-16 14:08:54,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:54,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-16 14:08:54,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:54,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:54,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:54,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:54,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-16 14:08:54,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23773916] [2020-09-16 14:08:54,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:54,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:54,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:54,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:54,444 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-16 14:08:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:54,911 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-16 14:08:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 14:08:54,911 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-16 14:08:54,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:54,912 INFO L225 Difference]: With dead ends: 80 [2020-09-16 14:08:54,913 INFO L226 Difference]: Without dead ends: 74 [2020-09-16 14:08:54,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:08:54,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-16 14:08:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-16 14:08:54,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-16 14:08:54,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-16 14:08:54,916 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-16 14:08:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:54,917 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-16 14:08:54,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-16 14:08:54,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:54,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:54,918 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:55,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-16 14:08:55,126 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:55,127 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-16 14:08:55,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:55,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468702664] [2020-09-16 14:08:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:55,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468702664] [2020-09-16 14:08:55,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815552560] [2020-09-16 14:08:55,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:55,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:08:55,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:55,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:55,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:55,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:55,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-16 14:08:55,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935297605] [2020-09-16 14:08:55,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:08:55,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:55,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:08:55,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:55,395 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-16 14:08:56,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:56,023 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-16 14:08:56,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:08:56,028 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-16 14:08:56,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:56,029 INFO L225 Difference]: With dead ends: 79 [2020-09-16 14:08:56,029 INFO L226 Difference]: Without dead ends: 73 [2020-09-16 14:08:56,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 14:08:56,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-16 14:08:56,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-16 14:08:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-16 14:08:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-16 14:08:56,032 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-16 14:08:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:56,032 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-16 14:08:56,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:08:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-16 14:08:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:56,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:56,033 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:56,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:56,240 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:56,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:56,241 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-16 14:08:56,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:56,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635762529] [2020-09-16 14:08:56,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:56,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:56,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635762529] [2020-09-16 14:08:56,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582106228] [2020-09-16 14:08:56,386 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 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 [2020-09-16 14:08:56,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-16 14:08:56,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:56,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:56,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:56,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:56,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-16 14:08:56,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627123397] [2020-09-16 14:08:56,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 14:08:56,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:56,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 14:08:56,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-16 14:08:56,464 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-16 14:08:56,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:56,970 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-16 14:08:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:08:56,971 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-16 14:08:56,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:56,972 INFO L225 Difference]: With dead ends: 95 [2020-09-16 14:08:56,972 INFO L226 Difference]: Without dead ends: 89 [2020-09-16 14:08:56,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 14:08:56,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-16 14:08:56,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-16 14:08:56,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-16 14:08:56,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-16 14:08:56,975 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-16 14:08:56,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:56,975 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-16 14:08:56,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 14:08:56,976 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-16 14:08:56,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:56,976 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:56,976 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:57,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-16 14:08:57,180 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:57,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:57,181 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-16 14:08:57,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:57,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826638672] [2020-09-16 14:08:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:57,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826638672] [2020-09-16 14:08:57,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541755469] [2020-09-16 14:08:57,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:08:57,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-16 14:08:57,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:57,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:57,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:57,390 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:08:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:57,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:57,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-16 14:08:57,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494077472] [2020-09-16 14:08:57,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:08:57,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:57,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:08:57,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:57,406 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-16 14:08:58,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:58,091 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-16 14:08:58,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:08:58,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-16 14:08:58,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:58,092 INFO L225 Difference]: With dead ends: 76 [2020-09-16 14:08:58,093 INFO L226 Difference]: Without dead ends: 68 [2020-09-16 14:08:58,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:08:58,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-16 14:08:58,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-16 14:08:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-16 14:08:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-16 14:08:58,096 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-16 14:08:58,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:58,096 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-16 14:08:58,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:08:58,096 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-16 14:08:58,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-16 14:08:58,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:58,097 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:58,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:58,306 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:58,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:58,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-16 14:08:58,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:58,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105775508] [2020-09-16 14:08:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:58,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105775508] [2020-09-16 14:08:58,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697414178] [2020-09-16 14:08:58,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:08:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:58,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-16 14:08:58,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:58,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:58,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:58,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-16 14:08:58,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918458959] [2020-09-16 14:08:58,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:08:58,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:58,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:08:58,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:08:58,546 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-16 14:08:59,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:08:59,183 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-16 14:08:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:08:59,184 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-16 14:08:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:08:59,185 INFO L225 Difference]: With dead ends: 84 [2020-09-16 14:08:59,185 INFO L226 Difference]: Without dead ends: 79 [2020-09-16 14:08:59,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:08:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-16 14:08:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-16 14:08:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-16 14:08:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-16 14:08:59,188 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-16 14:08:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:08:59,189 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-16 14:08:59,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:08:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-16 14:08:59,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:08:59,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:08:59,189 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:08:59,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-16 14:08:59,390 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:08:59,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:08:59,391 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-16 14:08:59,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:08:59,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074667931] [2020-09-16 14:08:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:08:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:08:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:59,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074667931] [2020-09-16 14:08:59,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822983286] [2020-09-16 14:08:59,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:08:59,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:08:59,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:08:59,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-16 14:08:59,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:08:59,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:08:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:08:59,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:08:59,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-16 14:08:59,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810984367] [2020-09-16 14:08:59,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 14:08:59,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:08:59,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 14:08:59,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:08:59,638 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-16 14:09:00,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:00,287 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-16 14:09:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:09:00,288 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-16 14:09:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:00,289 INFO L225 Difference]: With dead ends: 72 [2020-09-16 14:09:00,289 INFO L226 Difference]: Without dead ends: 67 [2020-09-16 14:09:00,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:09:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-16 14:09:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-16 14:09:00,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 14:09:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-16 14:09:00,293 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-16 14:09:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:00,294 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-16 14:09:00,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 14:09:00,295 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-16 14:09:00,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:09:00,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:00,295 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:00,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-16 14:09:00,497 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:00,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:00,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-16 14:09:00,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:00,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93734284] [2020-09-16 14:09:00,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:00,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93734284] [2020-09-16 14:09:00,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328899666] [2020-09-16 14:09:00,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:00,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-16 14:09:00,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:00,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-16 14:09:00,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:00,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:00,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-16 14:09:00,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290963553] [2020-09-16 14:09:00,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:09:00,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:00,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:09:00,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:09:00,770 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-16 14:09:01,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:01,066 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-16 14:09:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:09:01,067 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-16 14:09:01,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:01,068 INFO L225 Difference]: With dead ends: 78 [2020-09-16 14:09:01,068 INFO L226 Difference]: Without dead ends: 72 [2020-09-16 14:09:01,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:09:01,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-16 14:09:01,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-16 14:09:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-16 14:09:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-16 14:09:01,071 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-16 14:09:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:01,071 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-16 14:09:01,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:09:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-16 14:09:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:09:01,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:01,071 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:01,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:01,272 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-16 14:09:01,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:01,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235039976] [2020-09-16 14:09:01,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:01,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235039976] [2020-09-16 14:09:01,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094342450] [2020-09-16 14:09:01,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:01,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:09:01,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:01,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-16 14:09:01,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:01,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:01,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:01,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-16 14:09:01,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138033542] [2020-09-16 14:09:01,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 14:09:01,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:01,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 14:09:01,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:09:01,565 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-16 14:09:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:01,912 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-16 14:09:01,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:09:01,913 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-16 14:09:01,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:01,913 INFO L225 Difference]: With dead ends: 90 [2020-09-16 14:09:01,914 INFO L226 Difference]: Without dead ends: 84 [2020-09-16 14:09:01,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:09:01,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-16 14:09:01,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-16 14:09:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-16 14:09:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-16 14:09:01,918 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-16 14:09:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:01,918 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-16 14:09:01,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 14:09:01,919 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-16 14:09:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:09:01,919 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:01,919 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:02,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:02,127 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:02,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:02,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-16 14:09:02,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:02,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356074083] [2020-09-16 14:09:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:02,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:02,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356074083] [2020-09-16 14:09:02,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151694754] [2020-09-16 14:09:02,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:02,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-16 14:09:02,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:02,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-16 14:09:02,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:02,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:02,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-16 14:09:02,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657216692] [2020-09-16 14:09:02,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:09:02,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:02,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:09:02,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:09:02,377 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-16 14:09:02,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:02,704 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-16 14:09:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:09:02,705 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-16 14:09:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:02,706 INFO L225 Difference]: With dead ends: 91 [2020-09-16 14:09:02,706 INFO L226 Difference]: Without dead ends: 85 [2020-09-16 14:09:02,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:09:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-16 14:09:02,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-16 14:09:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-16 14:09:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-16 14:09:02,709 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-16 14:09:02,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:02,709 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-16 14:09:02,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:09:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-16 14:09:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:09:02,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:02,710 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:02,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:02,919 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:02,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:02,920 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-16 14:09:02,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:02,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125520483] [2020-09-16 14:09:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:03,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125520483] [2020-09-16 14:09:03,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474997772] [2020-09-16 14:09:03,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:03,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-16 14:09:03,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:03,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-16 14:09:03,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:03,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:03,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:03,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-16 14:09:03,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978252133] [2020-09-16 14:09:03,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 14:09:03,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:03,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 14:09:03,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:09:03,210 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-16 14:09:03,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:03,612 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-16 14:09:03,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:09:03,613 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-16 14:09:03,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:03,614 INFO L225 Difference]: With dead ends: 99 [2020-09-16 14:09:03,614 INFO L226 Difference]: Without dead ends: 93 [2020-09-16 14:09:03,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:09:03,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-16 14:09:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-16 14:09:03,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-16 14:09:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-16 14:09:03,619 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-16 14:09:03,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:03,619 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-16 14:09:03,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 14:09:03,620 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-16 14:09:03,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:09:03,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:03,621 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:03,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:03,831 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:03,832 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-16 14:09:03,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:03,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305159613] [2020-09-16 14:09:03,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:04,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305159613] [2020-09-16 14:09:04,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463609450] [2020-09-16 14:09:04,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:04,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-16 14:09:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:04,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:04,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-16 14:09:04,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571538296] [2020-09-16 14:09:04,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:09:04,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:04,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:09:04,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:09:04,138 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-16 14:09:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:04,651 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-16 14:09:04,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 14:09:04,651 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-16 14:09:04,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:04,653 INFO L225 Difference]: With dead ends: 99 [2020-09-16 14:09:04,653 INFO L226 Difference]: Without dead ends: 93 [2020-09-16 14:09:04,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-16 14:09:04,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-16 14:09:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-16 14:09:04,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-16 14:09:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-16 14:09:04,657 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-16 14:09:04,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:04,658 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-16 14:09:04,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:09:04,658 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-16 14:09:04,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:09:04,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:04,659 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:04,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-16 14:09:04,870 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:04,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-16 14:09:04,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:04,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617453062] [2020-09-16 14:09:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:05,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617453062] [2020-09-16 14:09:05,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527327248] [2020-09-16 14:09:05,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:05,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:09:05,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:05,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-16 14:09:05,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:05,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:05,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:05,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-16 14:09:05,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115492295] [2020-09-16 14:09:05,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 14:09:05,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:05,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 14:09:05,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:09:05,113 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-16 14:09:05,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:05,649 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-16 14:09:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 14:09:05,650 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-16 14:09:05,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:05,651 INFO L225 Difference]: With dead ends: 96 [2020-09-16 14:09:05,651 INFO L226 Difference]: Without dead ends: 90 [2020-09-16 14:09:05,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 14:09:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-16 14:09:05,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-16 14:09:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-16 14:09:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-16 14:09:05,654 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-16 14:09:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:05,654 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-16 14:09:05,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 14:09:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-16 14:09:05,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:09:05,655 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:05,655 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:05,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:05,856 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:05,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-16 14:09:05,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:05,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761748868] [2020-09-16 14:09:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:05,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761748868] [2020-09-16 14:09:05,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568541230] [2020-09-16 14:09:05,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:06,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-16 14:09:06,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:06,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-16 14:09:06,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:06,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:06,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-16 14:09:06,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346814843] [2020-09-16 14:09:06,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:09:06,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:06,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:09:06,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:09:06,097 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-16 14:09:06,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:06,548 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-16 14:09:06,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:09:06,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-16 14:09:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:06,550 INFO L225 Difference]: With dead ends: 97 [2020-09-16 14:09:06,550 INFO L226 Difference]: Without dead ends: 91 [2020-09-16 14:09:06,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 14:09:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-16 14:09:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-16 14:09:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-16 14:09:06,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-16 14:09:06,554 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-16 14:09:06,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:06,554 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-16 14:09:06,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:09:06,554 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-16 14:09:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:09:06,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:06,555 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:06,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-16 14:09:06,763 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:06,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-16 14:09:06,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:06,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33632630] [2020-09-16 14:09:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:06,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33632630] [2020-09-16 14:09:06,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990935348] [2020-09-16 14:09:06,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:06,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:09:06,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:06,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-16 14:09:06,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:07,028 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:07,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:07,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-16 14:09:07,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840704698] [2020-09-16 14:09:07,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 14:09:07,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:07,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 14:09:07,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:09:07,041 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-16 14:09:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:07,644 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-16 14:09:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:09:07,645 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-16 14:09:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:07,646 INFO L225 Difference]: With dead ends: 94 [2020-09-16 14:09:07,646 INFO L226 Difference]: Without dead ends: 88 [2020-09-16 14:09:07,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-09-16 14:09:07,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-16 14:09:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-16 14:09:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-16 14:09:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-16 14:09:07,650 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-16 14:09:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:07,651 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-16 14:09:07,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 14:09:07,651 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-16 14:09:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:09:07,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:07,652 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:07,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:07,863 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:07,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-16 14:09:07,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:07,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778910691] [2020-09-16 14:09:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:08,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778910691] [2020-09-16 14:09:08,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897610177] [2020-09-16 14:09:08,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:08,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-16 14:09:08,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:08,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-16 14:09:08,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:08,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:08,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-16 14:09:08,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563411572] [2020-09-16 14:09:08,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:09:08,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:08,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:09:08,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:09:08,151 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-16 14:09:08,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:08,656 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-16 14:09:08,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-16 14:09:08,657 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-16 14:09:08,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:08,658 INFO L225 Difference]: With dead ends: 95 [2020-09-16 14:09:08,658 INFO L226 Difference]: Without dead ends: 89 [2020-09-16 14:09:08,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:09:08,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-16 14:09:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-16 14:09:08,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-16 14:09:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-16 14:09:08,662 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-16 14:09:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:08,662 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-16 14:09:08,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:09:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-16 14:09:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:09:08,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:08,662 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:08,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-16 14:09:08,863 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:08,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:08,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-16 14:09:08,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:08,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14459713] [2020-09-16 14:09:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:09,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14459713] [2020-09-16 14:09:09,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316020951] [2020-09-16 14:09:09,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:09,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-16 14:09:09,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:09,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-16 14:09:09,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:09,127 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:09,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:09,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-16 14:09:09,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800473087] [2020-09-16 14:09:09,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 14:09:09,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:09,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 14:09:09,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:09:09,143 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-16 14:09:09,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:09,843 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-16 14:09:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:09:09,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-16 14:09:09,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:09,845 INFO L225 Difference]: With dead ends: 92 [2020-09-16 14:09:09,845 INFO L226 Difference]: Without dead ends: 86 [2020-09-16 14:09:09,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:09:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-16 14:09:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-16 14:09:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-16 14:09:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-16 14:09:09,847 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-16 14:09:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:09,848 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-16 14:09:09,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 14:09:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-16 14:09:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:09:09,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:09,848 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:10,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:10,049 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:10,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:10,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-16 14:09:10,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:10,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704203678] [2020-09-16 14:09:10,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:10,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704203678] [2020-09-16 14:09:10,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017667930] [2020-09-16 14:09:10,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:10,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-16 14:09:10,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:10,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:10,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-16 14:09:10,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422461709] [2020-09-16 14:09:10,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 14:09:10,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:10,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 14:09:10,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:09:10,282 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-16 14:09:10,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:10,825 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-16 14:09:10,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 14:09:10,826 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-16 14:09:10,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:10,826 INFO L225 Difference]: With dead ends: 112 [2020-09-16 14:09:10,827 INFO L226 Difference]: Without dead ends: 106 [2020-09-16 14:09:10,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:09:10,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-16 14:09:10,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-16 14:09:10,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-16 14:09:10,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-16 14:09:10,830 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-16 14:09:10,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:10,830 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-16 14:09:10,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 14:09:10,830 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-16 14:09:10,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 14:09:10,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:10,831 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:11,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:11,031 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:11,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:11,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-16 14:09:11,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:11,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568696296] [2020-09-16 14:09:11,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:11,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568696296] [2020-09-16 14:09:11,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567636352] [2020-09-16 14:09:11,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:09:11,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:09:11,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:11,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-16 14:09:11,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:11,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:11,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:11,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-16 14:09:11,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293993831] [2020-09-16 14:09:11,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 14:09:11,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:11,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 14:09:11,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:09:11,288 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-16 14:09:12,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:12,042 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-16 14:09:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:09:12,043 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-16 14:09:12,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:12,044 INFO L225 Difference]: With dead ends: 93 [2020-09-16 14:09:12,044 INFO L226 Difference]: Without dead ends: 85 [2020-09-16 14:09:12,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-09-16 14:09:12,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-16 14:09:12,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-16 14:09:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-16 14:09:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-16 14:09:12,047 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-16 14:09:12,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:12,047 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-16 14:09:12,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 14:09:12,047 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-16 14:09:12,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 14:09:12,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:12,048 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:12,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:12,248 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:12,249 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-16 14:09:12,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:12,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727556445] [2020-09-16 14:09:12,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:12,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727556445] [2020-09-16 14:09:12,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340929750] [2020-09-16 14:09:12,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:09:12,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-16 14:09:12,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:12,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 14:09:12,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:12,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:12,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-16 14:09:12,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370393748] [2020-09-16 14:09:12,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 14:09:12,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:12,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 14:09:12,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:09:12,542 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-16 14:09:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:12,912 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-16 14:09:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:09:12,913 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-16 14:09:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:12,914 INFO L225 Difference]: With dead ends: 104 [2020-09-16 14:09:12,914 INFO L226 Difference]: Without dead ends: 98 [2020-09-16 14:09:12,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:09:12,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-16 14:09:12,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-16 14:09:12,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-16 14:09:12,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-16 14:09:12,917 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-16 14:09:12,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:12,917 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-16 14:09:12,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 14:09:12,917 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-16 14:09:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 14:09:12,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:12,918 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:13,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:13,127 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:13,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:13,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-16 14:09:13,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:13,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333450609] [2020-09-16 14:09:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:13,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333450609] [2020-09-16 14:09:13,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027845201] [2020-09-16 14:09:13,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:13,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:09:13,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:13,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 14:09:13,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:13,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:13,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:13,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-16 14:09:13,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621246460] [2020-09-16 14:09:13,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:09:13,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:13,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:09:13,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:09:13,451 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-16 14:09:13,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:13,920 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-16 14:09:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:09:13,920 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-16 14:09:13,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:13,922 INFO L225 Difference]: With dead ends: 101 [2020-09-16 14:09:13,922 INFO L226 Difference]: Without dead ends: 95 [2020-09-16 14:09:13,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-16 14:09:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-16 14:09:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-16 14:09:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-16 14:09:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-16 14:09:13,925 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-16 14:09:13,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:13,925 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-16 14:09:13,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:09:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-16 14:09:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 14:09:13,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:13,926 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:14,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:14,129 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:14,130 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-16 14:09:14,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:14,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213128612] [2020-09-16 14:09:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:14,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213128612] [2020-09-16 14:09:14,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874787423] [2020-09-16 14:09:14,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:14,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-16 14:09:14,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:14,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 14:09:14,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:14,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:14,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-16 14:09:14,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045676981] [2020-09-16 14:09:14,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 14:09:14,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:14,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 14:09:14,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:09:14,417 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-16 14:09:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:14,853 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-16 14:09:14,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:09:14,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-16 14:09:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:14,855 INFO L225 Difference]: With dead ends: 98 [2020-09-16 14:09:14,855 INFO L226 Difference]: Without dead ends: 92 [2020-09-16 14:09:14,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:09:14,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-16 14:09:14,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-16 14:09:14,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-16 14:09:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-16 14:09:14,859 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-16 14:09:14,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:14,860 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-16 14:09:14,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 14:09:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-16 14:09:14,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 14:09:14,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:14,861 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:15,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:15,070 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:15,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:15,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-16 14:09:15,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:15,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452613707] [2020-09-16 14:09:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:15,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452613707] [2020-09-16 14:09:15,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114634263] [2020-09-16 14:09:15,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:15,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-16 14:09:15,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:15,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 14:09:15,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:15,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:15,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:15,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-16 14:09:15,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592990063] [2020-09-16 14:09:15,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:09:15,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:15,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:09:15,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:09:15,363 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-16 14:09:15,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:15,913 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-16 14:09:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 14:09:15,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-16 14:09:15,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:15,915 INFO L225 Difference]: With dead ends: 97 [2020-09-16 14:09:15,915 INFO L226 Difference]: Without dead ends: 91 [2020-09-16 14:09:15,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 14:09:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-16 14:09:15,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-16 14:09:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-16 14:09:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-16 14:09:15,919 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-16 14:09:15,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:15,919 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-16 14:09:15,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:09:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-16 14:09:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 14:09:15,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:15,920 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:16,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:16,124 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:16,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:16,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-16 14:09:16,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:16,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048453951] [2020-09-16 14:09:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:16,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048453951] [2020-09-16 14:09:16,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092199947] [2020-09-16 14:09:16,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:16,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 14:09:16,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:16,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:16,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-16 14:09:16,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877383080] [2020-09-16 14:09:16,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 14:09:16,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:16,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 14:09:16,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:09:16,385 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-16 14:09:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:16,879 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-16 14:09:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 14:09:16,880 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-16 14:09:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:16,881 INFO L225 Difference]: With dead ends: 94 [2020-09-16 14:09:16,881 INFO L226 Difference]: Without dead ends: 88 [2020-09-16 14:09:16,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 14:09:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-16 14:09:16,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-16 14:09:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-16 14:09:16,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-16 14:09:16,885 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-16 14:09:16,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:16,885 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-16 14:09:16,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 14:09:16,885 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-16 14:09:16,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 14:09:16,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:16,886 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:17,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-16 14:09:17,093 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:17,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:17,094 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-16 14:09:17,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:17,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043432503] [2020-09-16 14:09:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:17,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043432503] [2020-09-16 14:09:17,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510783069] [2020-09-16 14:09:17,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:09:17,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:09:17,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:17,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 14:09:17,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:17,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:17,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:17,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-16 14:09:17,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483302436] [2020-09-16 14:09:17,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:09:17,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:17,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:09:17,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:09:17,398 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-16 14:09:18,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:18,045 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-16 14:09:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:09:18,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-16 14:09:18,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:18,046 INFO L225 Difference]: With dead ends: 93 [2020-09-16 14:09:18,047 INFO L226 Difference]: Without dead ends: 87 [2020-09-16 14:09:18,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:09:18,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-16 14:09:18,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-16 14:09:18,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-16 14:09:18,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-16 14:09:18,050 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-16 14:09:18,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:18,050 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-16 14:09:18,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:09:18,050 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-16 14:09:18,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 14:09:18,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:18,050 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:18,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:18,251 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:18,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:18,252 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-16 14:09:18,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:18,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629344017] [2020-09-16 14:09:18,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:18,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629344017] [2020-09-16 14:09:18,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516896012] [2020-09-16 14:09:18,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:18,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-16 14:09:18,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:18,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 14:09:18,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:18,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:18,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-16 14:09:18,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516624365] [2020-09-16 14:09:18,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 14:09:18,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:18,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 14:09:18,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:09:18,483 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-16 14:09:19,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:19,045 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-16 14:09:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:09:19,045 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-16 14:09:19,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:19,046 INFO L225 Difference]: With dead ends: 90 [2020-09-16 14:09:19,046 INFO L226 Difference]: Without dead ends: 84 [2020-09-16 14:09:19,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-16 14:09:19,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-16 14:09:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-16 14:09:19,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-16 14:09:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-16 14:09:19,049 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-16 14:09:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:19,050 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-16 14:09:19,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 14:09:19,050 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-16 14:09:19,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 14:09:19,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:19,050 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:19,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-16 14:09:19,256 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:19,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:19,257 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-16 14:09:19,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:19,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664473049] [2020-09-16 14:09:19,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:19,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664473049] [2020-09-16 14:09:19,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625385173] [2020-09-16 14:09:19,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:19,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:09:19,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:19,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 14:09:19,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:19,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:19,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:19,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-16 14:09:19,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427438866] [2020-09-16 14:09:19,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:09:19,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:19,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:09:19,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:09:19,538 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-16 14:09:20,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:20,275 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-16 14:09:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:09:20,276 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-16 14:09:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:20,277 INFO L225 Difference]: With dead ends: 89 [2020-09-16 14:09:20,277 INFO L226 Difference]: Without dead ends: 83 [2020-09-16 14:09:20,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:09:20,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-16 14:09:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-16 14:09:20,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-16 14:09:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-16 14:09:20,280 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-16 14:09:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:20,280 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-16 14:09:20,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:09:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-16 14:09:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 14:09:20,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:20,281 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:20,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:20,482 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:20,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:20,482 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-16 14:09:20,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:20,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626390649] [2020-09-16 14:09:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:20,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626390649] [2020-09-16 14:09:20,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843145043] [2020-09-16 14:09:20,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:20,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-16 14:09:20,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:20,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 14:09:20,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:20,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:20,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-16 14:09:20,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640672393] [2020-09-16 14:09:20,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 14:09:20,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:20,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 14:09:20,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:09:20,755 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-16 14:09:21,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:21,361 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-16 14:09:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-16 14:09:21,362 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-16 14:09:21,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:21,363 INFO L225 Difference]: With dead ends: 86 [2020-09-16 14:09:21,363 INFO L226 Difference]: Without dead ends: 80 [2020-09-16 14:09:21,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:09:21,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-16 14:09:21,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-16 14:09:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-16 14:09:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-16 14:09:21,367 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-16 14:09:21,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:21,367 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-16 14:09:21,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 14:09:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-16 14:09:21,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 14:09:21,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:21,368 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:21,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:21,578 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:21,579 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-16 14:09:21,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:21,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262389659] [2020-09-16 14:09:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:21,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262389659] [2020-09-16 14:09:21,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3024752] [2020-09-16 14:09:21,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:21,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-16 14:09:21,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:21,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 14:09:21,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:21,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:21,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:21,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-16 14:09:21,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212924913] [2020-09-16 14:09:21,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:09:21,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:21,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:09:21,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:09:21,876 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-16 14:09:22,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:22,701 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-16 14:09:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:09:22,702 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-16 14:09:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:22,703 INFO L225 Difference]: With dead ends: 85 [2020-09-16 14:09:22,703 INFO L226 Difference]: Without dead ends: 79 [2020-09-16 14:09:22,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-16 14:09:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-16 14:09:22,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-16 14:09:22,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-16 14:09:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-16 14:09:22,707 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-16 14:09:22,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:22,707 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-16 14:09:22,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:09:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-16 14:09:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 14:09:22,708 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:22,708 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:22,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:22,909 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:22,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:22,909 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-16 14:09:22,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:22,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740938089] [2020-09-16 14:09:22,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:23,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740938089] [2020-09-16 14:09:23,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890266266] [2020-09-16 14:09:23,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:23,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 14:09:23,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:23,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:23,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-16 14:09:23,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308675604] [2020-09-16 14:09:23,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 14:09:23,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:23,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 14:09:23,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-16 14:09:23,164 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-16 14:09:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:23,858 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-16 14:09:23,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 14:09:23,858 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-16 14:09:23,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:23,860 INFO L225 Difference]: With dead ends: 101 [2020-09-16 14:09:23,860 INFO L226 Difference]: Without dead ends: 95 [2020-09-16 14:09:23,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-16 14:09:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-16 14:09:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-16 14:09:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-16 14:09:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-16 14:09:23,863 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-16 14:09:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:23,863 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-16 14:09:23,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 14:09:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-16 14:09:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 14:09:23,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:23,864 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:24,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:24,072 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:24,073 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-16 14:09:24,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:24,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036742340] [2020-09-16 14:09:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:24,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036742340] [2020-09-16 14:09:24,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084513027] [2020-09-16 14:09:24,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:24,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:09:24,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:24,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 14:09:24,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:24,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:24,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:24,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-16 14:09:24,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832476741] [2020-09-16 14:09:24,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:09:24,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:24,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:09:24,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:09:24,366 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-16 14:09:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:25,231 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-09-16 14:09:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:09:25,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-16 14:09:25,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:25,233 INFO L225 Difference]: With dead ends: 82 [2020-09-16 14:09:25,233 INFO L226 Difference]: Without dead ends: 74 [2020-09-16 14:09:25,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-09-16 14:09:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-16 14:09:25,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-09-16 14:09:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-16 14:09:25,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-16 14:09:25,236 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-16 14:09:25,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:25,236 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-16 14:09:25,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:09:25,236 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-16 14:09:25,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 14:09:25,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:25,236 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:25,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:25,437 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:25,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:25,438 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-16 14:09:25,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:25,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644176418] [2020-09-16 14:09:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:25,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644176418] [2020-09-16 14:09:25,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051964096] [2020-09-16 14:09:25,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:25,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-16 14:09:25,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:25,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-16 14:09:25,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:25,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:09:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:25,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:25,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-16 14:09:25,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315634752] [2020-09-16 14:09:25,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:09:25,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:25,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:09:25,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:09:25,725 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-16 14:09:26,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:26,541 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-16 14:09:26,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 14:09:26,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-16 14:09:26,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:26,543 INFO L225 Difference]: With dead ends: 92 [2020-09-16 14:09:26,543 INFO L226 Difference]: Without dead ends: 87 [2020-09-16 14:09:26,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-16 14:09:26,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-16 14:09:26,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-16 14:09:26,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-16 14:09:26,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-16 14:09:26,547 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-16 14:09:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:26,547 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-16 14:09:26,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:09:26,548 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-16 14:09:26,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:26,548 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:26,548 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:26,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:26,759 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:26,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:26,760 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-16 14:09:26,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:26,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018219171] [2020-09-16 14:09:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:26,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018219171] [2020-09-16 14:09:26,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530614427] [2020-09-16 14:09:26,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:27,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:09:27,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:27,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:27,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:27,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:09:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:27,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:27,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-16 14:09:27,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051869535] [2020-09-16 14:09:27,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:09:27,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:27,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:09:27,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:09:27,074 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-16 14:09:27,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:27,962 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-16 14:09:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 14:09:27,963 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-16 14:09:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:27,964 INFO L225 Difference]: With dead ends: 78 [2020-09-16 14:09:27,964 INFO L226 Difference]: Without dead ends: 73 [2020-09-16 14:09:27,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-16 14:09:27,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-16 14:09:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-16 14:09:27,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-16 14:09:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-16 14:09:27,966 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-16 14:09:27,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:27,967 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-16 14:09:27,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:09:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-16 14:09:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:27,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:27,967 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:28,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-16 14:09:28,168 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-16 14:09:28,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:28,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170594977] [2020-09-16 14:09:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:28,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170594977] [2020-09-16 14:09:28,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672991741] [2020-09-16 14:09:28,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:28,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-16 14:09:28,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:28,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:28,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:28,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:28,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-16 14:09:28,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466760430] [2020-09-16 14:09:28,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:09:28,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:28,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:09:28,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:09:28,497 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-16 14:09:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:28,874 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-16 14:09:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:09:28,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-16 14:09:28,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:28,876 INFO L225 Difference]: With dead ends: 84 [2020-09-16 14:09:28,876 INFO L226 Difference]: Without dead ends: 78 [2020-09-16 14:09:28,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-16 14:09:28,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-16 14:09:28,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-16 14:09:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-16 14:09:28,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-16 14:09:28,880 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-16 14:09:28,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:28,880 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-16 14:09:28,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:09:28,880 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-16 14:09:28,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:28,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:28,881 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:29,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:29,082 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:29,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:29,082 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-16 14:09:29,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:29,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545481679] [2020-09-16 14:09:29,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:29,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545481679] [2020-09-16 14:09:29,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442690791] [2020-09-16 14:09:29,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:29,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-16 14:09:29,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:29,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:29,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:29,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:29,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:29,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-16 14:09:29,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330745818] [2020-09-16 14:09:29,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:09:29,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:29,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:09:29,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:09:29,401 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-16 14:09:29,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:29,807 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-16 14:09:29,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:09:29,808 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-16 14:09:29,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:29,809 INFO L225 Difference]: With dead ends: 98 [2020-09-16 14:09:29,809 INFO L226 Difference]: Without dead ends: 92 [2020-09-16 14:09:29,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-16 14:09:29,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-16 14:09:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-16 14:09:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-16 14:09:29,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-16 14:09:29,812 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-16 14:09:29,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:29,812 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-16 14:09:29,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:09:29,813 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-16 14:09:29,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:29,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:29,813 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:30,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-16 14:09:30,016 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:30,017 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-16 14:09:30,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:30,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199246637] [2020-09-16 14:09:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:30,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199246637] [2020-09-16 14:09:30,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658042332] [2020-09-16 14:09:30,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:30,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:30,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:30,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:30,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-16 14:09:30,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058754504] [2020-09-16 14:09:30,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:09:30,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:30,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:09:30,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:09:30,335 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-16 14:09:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:30,815 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-16 14:09:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 14:09:30,815 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-16 14:09:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:30,816 INFO L225 Difference]: With dead ends: 99 [2020-09-16 14:09:30,816 INFO L226 Difference]: Without dead ends: 93 [2020-09-16 14:09:30,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 14:09:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-16 14:09:30,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-16 14:09:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-16 14:09:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-16 14:09:30,818 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-16 14:09:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:30,819 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-16 14:09:30,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:09:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-16 14:09:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:30,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:30,819 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:31,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:31,026 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:31,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:31,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-16 14:09:31,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:31,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461316081] [2020-09-16 14:09:31,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:31,256 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:31,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461316081] [2020-09-16 14:09:31,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913240000] [2020-09-16 14:09:31,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:31,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:09:31,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:31,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:31,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:31,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:31,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:31,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-16 14:09:31,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096624778] [2020-09-16 14:09:31,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:09:31,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:31,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:09:31,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:09:31,352 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-16 14:09:31,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:31,874 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-16 14:09:31,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 14:09:31,874 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-16 14:09:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:31,875 INFO L225 Difference]: With dead ends: 109 [2020-09-16 14:09:31,875 INFO L226 Difference]: Without dead ends: 103 [2020-09-16 14:09:31,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-16 14:09:31,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-16 14:09:31,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-16 14:09:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-16 14:09:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-16 14:09:31,878 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-16 14:09:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:31,878 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-16 14:09:31,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:09:31,878 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-16 14:09:31,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:31,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:31,879 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:32,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:32,083 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:32,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:32,084 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-16 14:09:32,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:32,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789595482] [2020-09-16 14:09:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:32,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789595482] [2020-09-16 14:09:32,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298404046] [2020-09-16 14:09:32,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:32,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-16 14:09:32,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:32,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:32,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:32,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:32,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-16 14:09:32,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346215197] [2020-09-16 14:09:32,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:09:32,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:32,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:09:32,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:09:32,393 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-16 14:09:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:32,945 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-16 14:09:32,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:09:32,946 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-16 14:09:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:32,947 INFO L225 Difference]: With dead ends: 109 [2020-09-16 14:09:32,947 INFO L226 Difference]: Without dead ends: 103 [2020-09-16 14:09:32,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:09:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-16 14:09:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-16 14:09:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-16 14:09:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-16 14:09:32,951 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-16 14:09:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:32,951 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-16 14:09:32,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:09:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-16 14:09:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:32,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:32,952 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:33,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-16 14:09:33,160 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:33,161 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-16 14:09:33,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:33,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171892374] [2020-09-16 14:09:33,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:33,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171892374] [2020-09-16 14:09:33,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938127134] [2020-09-16 14:09:33,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:33,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:09:33,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:33,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:33,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:33,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:33,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:33,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-16 14:09:33,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265009790] [2020-09-16 14:09:33,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:09:33,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:33,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:09:33,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:09:33,491 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-16 14:09:34,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:34,123 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-16 14:09:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:09:34,124 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-16 14:09:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:34,125 INFO L225 Difference]: With dead ends: 106 [2020-09-16 14:09:34,126 INFO L226 Difference]: Without dead ends: 100 [2020-09-16 14:09:34,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:09:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-16 14:09:34,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-16 14:09:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-16 14:09:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-16 14:09:34,129 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-16 14:09:34,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:34,129 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-16 14:09:34,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:09:34,129 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-16 14:09:34,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:34,130 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:34,130 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:34,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-16 14:09:34,339 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:34,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-16 14:09:34,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:34,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730490435] [2020-09-16 14:09:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:34,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730490435] [2020-09-16 14:09:34,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850924352] [2020-09-16 14:09:34,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:34,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-16 14:09:34,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:34,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:34,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:34,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-16 14:09:34,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623029640] [2020-09-16 14:09:34,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:09:34,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:34,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:09:34,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:09:34,638 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-16 14:09:35,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:35,224 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-16 14:09:35,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-16 14:09:35,224 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-16 14:09:35,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:35,225 INFO L225 Difference]: With dead ends: 107 [2020-09-16 14:09:35,225 INFO L226 Difference]: Without dead ends: 101 [2020-09-16 14:09:35,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:09:35,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-16 14:09:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-16 14:09:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-16 14:09:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-16 14:09:35,229 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-16 14:09:35,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:35,229 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-16 14:09:35,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:09:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-16 14:09:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:35,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:35,230 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:35,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:35,431 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:35,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:35,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-16 14:09:35,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:35,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214771366] [2020-09-16 14:09:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:35,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214771366] [2020-09-16 14:09:35,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785434595] [2020-09-16 14:09:35,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:35,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-16 14:09:35,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:35,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:35,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:35,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:35,747 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:35,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:35,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-16 14:09:35,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28412426] [2020-09-16 14:09:35,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:09:35,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:35,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:09:35,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:09:35,748 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-16 14:09:36,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:36,474 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-16 14:09:36,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:09:36,475 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-16 14:09:36,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:36,476 INFO L225 Difference]: With dead ends: 104 [2020-09-16 14:09:36,476 INFO L226 Difference]: Without dead ends: 98 [2020-09-16 14:09:36,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-16 14:09:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-16 14:09:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-16 14:09:36,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-16 14:09:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-16 14:09:36,478 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-16 14:09:36,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:36,479 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-16 14:09:36,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:09:36,479 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-16 14:09:36,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:36,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:36,482 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:36,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-16 14:09:36,682 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:36,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:36,683 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-16 14:09:36,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:36,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120756040] [2020-09-16 14:09:36,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:36,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120756040] [2020-09-16 14:09:36,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342457940] [2020-09-16 14:09:36,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:36,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:36,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:36,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:36,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-16 14:09:36,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950007223] [2020-09-16 14:09:36,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:09:36,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:36,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:09:36,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:09:36,971 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-16 14:09:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:37,634 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-16 14:09:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 14:09:37,635 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-16 14:09:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:37,636 INFO L225 Difference]: With dead ends: 105 [2020-09-16 14:09:37,636 INFO L226 Difference]: Without dead ends: 99 [2020-09-16 14:09:37,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-16 14:09:37,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-16 14:09:37,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-16 14:09:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-16 14:09:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-16 14:09:37,640 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-16 14:09:37,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:37,640 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-16 14:09:37,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:09:37,640 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-16 14:09:37,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:37,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:37,641 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:37,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:37,844 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:37,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-16 14:09:37,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:37,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364335224] [2020-09-16 14:09:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:38,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364335224] [2020-09-16 14:09:38,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614725529] [2020-09-16 14:09:38,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:38,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:09:38,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:38,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:38,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:38,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:38,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:38,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-16 14:09:38,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037704594] [2020-09-16 14:09:38,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:09:38,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:38,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:09:38,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:09:38,140 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-16 14:09:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:38,940 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-16 14:09:38,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:09:38,941 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-16 14:09:38,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:38,942 INFO L225 Difference]: With dead ends: 102 [2020-09-16 14:09:38,942 INFO L226 Difference]: Without dead ends: 96 [2020-09-16 14:09:38,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:09:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-16 14:09:38,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-16 14:09:38,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-16 14:09:38,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-16 14:09:38,944 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-16 14:09:38,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:38,945 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-16 14:09:38,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:09:38,945 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-16 14:09:38,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:38,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:38,945 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:39,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-16 14:09:39,146 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:39,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:39,147 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-16 14:09:39,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:39,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481664984] [2020-09-16 14:09:39,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:39,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481664984] [2020-09-16 14:09:39,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540336342] [2020-09-16 14:09:39,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:39,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-16 14:09:39,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:39,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:39,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:39,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:39,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-16 14:09:39,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098363279] [2020-09-16 14:09:39,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:09:39,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:39,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:09:39,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:09:39,436 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-16 14:09:40,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:40,162 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-16 14:09:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:09:40,163 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-16 14:09:40,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:40,164 INFO L225 Difference]: With dead ends: 103 [2020-09-16 14:09:40,164 INFO L226 Difference]: Without dead ends: 97 [2020-09-16 14:09:40,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-16 14:09:40,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-16 14:09:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-16 14:09:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-16 14:09:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-16 14:09:40,166 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-16 14:09:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:40,167 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-16 14:09:40,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:09:40,167 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-16 14:09:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:40,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:40,167 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:40,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:40,371 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:40,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:40,371 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-16 14:09:40,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:40,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820753415] [2020-09-16 14:09:40,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:40,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820753415] [2020-09-16 14:09:40,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648720334] [2020-09-16 14:09:40,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:40,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:09:40,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:40,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:40,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:40,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:40,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:40,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-16 14:09:40,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461006188] [2020-09-16 14:09:40,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:09:40,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:40,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:09:40,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:09:40,677 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-16 14:09:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:41,594 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-16 14:09:41,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:09:41,595 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-16 14:09:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:41,595 INFO L225 Difference]: With dead ends: 100 [2020-09-16 14:09:41,595 INFO L226 Difference]: Without dead ends: 94 [2020-09-16 14:09:41,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-16 14:09:41,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-16 14:09:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-16 14:09:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-16 14:09:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-16 14:09:41,598 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-16 14:09:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:41,599 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-16 14:09:41,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:09:41,599 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-16 14:09:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:41,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:41,599 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:41,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-16 14:09:41,800 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:41,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-16 14:09:41,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:41,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134090946] [2020-09-16 14:09:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:42,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134090946] [2020-09-16 14:09:42,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029259851] [2020-09-16 14:09:42,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:42,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-16 14:09:42,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:42,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:42,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:42,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:42,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-16 14:09:42,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205344847] [2020-09-16 14:09:42,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:09:42,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:42,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:09:42,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:09:42,094 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-16 14:09:42,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:42,905 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-16 14:09:42,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-16 14:09:42,906 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-16 14:09:42,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:42,907 INFO L225 Difference]: With dead ends: 120 [2020-09-16 14:09:42,907 INFO L226 Difference]: Without dead ends: 114 [2020-09-16 14:09:42,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:09:42,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-16 14:09:42,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-16 14:09:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-16 14:09:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-16 14:09:42,910 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-16 14:09:42,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:42,911 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-16 14:09:42,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:09:42,911 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-16 14:09:42,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-16 14:09:42,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:42,912 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:43,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-16 14:09:43,121 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:43,122 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-16 14:09:43,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:43,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185032255] [2020-09-16 14:09:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:43,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185032255] [2020-09-16 14:09:43,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104758152] [2020-09-16 14:09:43,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:43,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-16 14:09:43,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-16 14:09:43,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:43,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:43,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:43,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-16 14:09:43,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507407133] [2020-09-16 14:09:43,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:09:43,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:43,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:09:43,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:09:43,420 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-16 14:09:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:44,381 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-16 14:09:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:09:44,381 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-16 14:09:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:44,382 INFO L225 Difference]: With dead ends: 101 [2020-09-16 14:09:44,382 INFO L226 Difference]: Without dead ends: 93 [2020-09-16 14:09:44,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 14:09:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-16 14:09:44,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-16 14:09:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-16 14:09:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-16 14:09:44,389 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-16 14:09:44,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:44,389 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-16 14:09:44,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:09:44,390 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-16 14:09:44,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:09:44,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:44,390 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:44,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:44,593 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:44,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:44,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-16 14:09:44,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:44,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786611774] [2020-09-16 14:09:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:44,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786611774] [2020-09-16 14:09:44,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716966000] [2020-09-16 14:09:44,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:09:44,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:44,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:44,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-16 14:09:44,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989333912] [2020-09-16 14:09:44,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:09:44,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:44,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:09:44,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:09:44,955 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-16 14:09:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:45,393 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-16 14:09:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:09:45,393 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-16 14:09:45,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:45,394 INFO L225 Difference]: With dead ends: 114 [2020-09-16 14:09:45,394 INFO L226 Difference]: Without dead ends: 108 [2020-09-16 14:09:45,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 14:09:45,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-16 14:09:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-16 14:09:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-16 14:09:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-16 14:09:45,396 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-16 14:09:45,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:45,397 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-16 14:09:45,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:09:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-16 14:09:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:09:45,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:45,398 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:45,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:45,604 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:45,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:45,605 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-16 14:09:45,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:45,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163790372] [2020-09-16 14:09:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:45,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163790372] [2020-09-16 14:09:45,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881427781] [2020-09-16 14:09:45,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:45,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:09:45,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:45,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:09:45,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:45,979 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:45,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:45,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-16 14:09:45,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893282508] [2020-09-16 14:09:45,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:09:45,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:45,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:09:45,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:09:45,991 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-16 14:09:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:46,568 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-16 14:09:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 14:09:46,569 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-16 14:09:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:46,570 INFO L225 Difference]: With dead ends: 111 [2020-09-16 14:09:46,570 INFO L226 Difference]: Without dead ends: 105 [2020-09-16 14:09:46,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:09:46,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-16 14:09:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-16 14:09:46,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-16 14:09:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-16 14:09:46,574 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-16 14:09:46,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:46,574 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-16 14:09:46,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:09:46,574 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-16 14:09:46,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:09:46,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:46,575 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:46,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-16 14:09:46,785 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:46,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:46,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-16 14:09:46,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:46,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675525328] [2020-09-16 14:09:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:47,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675525328] [2020-09-16 14:09:47,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097497400] [2020-09-16 14:09:47,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:47,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-16 14:09:47,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:47,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:09:47,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:47,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:47,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-16 14:09:47,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700074519] [2020-09-16 14:09:47,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:09:47,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:47,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:09:47,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:09:47,133 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-16 14:09:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:47,661 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-16 14:09:47,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 14:09:47,662 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-16 14:09:47,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:47,663 INFO L225 Difference]: With dead ends: 108 [2020-09-16 14:09:47,663 INFO L226 Difference]: Without dead ends: 102 [2020-09-16 14:09:47,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-16 14:09:47,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-16 14:09:47,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-16 14:09:47,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-16 14:09:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-16 14:09:47,665 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-16 14:09:47,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:47,665 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-16 14:09:47,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:09:47,665 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-16 14:09:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:09:47,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:47,666 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:47,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:47,872 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:47,873 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-16 14:09:47,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:47,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659113501] [2020-09-16 14:09:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:48,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659113501] [2020-09-16 14:09:48,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463021129] [2020-09-16 14:09:48,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:48,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:09:48,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:48,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:09:48,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:48,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:48,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:48,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-16 14:09:48,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128062065] [2020-09-16 14:09:48,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:09:48,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:48,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:09:48,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:09:48,240 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-16 14:09:48,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:48,908 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-16 14:09:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:09:48,909 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-16 14:09:48,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:48,909 INFO L225 Difference]: With dead ends: 107 [2020-09-16 14:09:48,910 INFO L226 Difference]: Without dead ends: 101 [2020-09-16 14:09:48,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:09:48,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-16 14:09:48,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-16 14:09:48,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-16 14:09:48,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-16 14:09:48,913 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-16 14:09:48,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:48,913 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-16 14:09:48,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:09:48,913 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-16 14:09:48,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:09:48,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:48,914 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:49,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-16 14:09:49,122 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:49,123 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-16 14:09:49,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:49,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348957795] [2020-09-16 14:09:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:49,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348957795] [2020-09-16 14:09:49,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037191588] [2020-09-16 14:09:49,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:49,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-16 14:09:49,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:49,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:09:49,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:49,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:49,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-16 14:09:49,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401645967] [2020-09-16 14:09:49,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:09:49,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:09:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:09:49,436 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-16 14:09:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:50,049 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-16 14:09:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:09:50,050 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-16 14:09:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:50,051 INFO L225 Difference]: With dead ends: 104 [2020-09-16 14:09:50,052 INFO L226 Difference]: Without dead ends: 98 [2020-09-16 14:09:50,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:09:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-16 14:09:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-16 14:09:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-16 14:09:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-16 14:09:50,055 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-16 14:09:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:50,055 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-16 14:09:50,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:09:50,055 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-16 14:09:50,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:09:50,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:50,056 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:50,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-16 14:09:50,265 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:50,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:50,266 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-16 14:09:50,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:50,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077222476] [2020-09-16 14:09:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:50,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077222476] [2020-09-16 14:09:50,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549821277] [2020-09-16 14:09:50,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:50,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-16 14:09:50,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:50,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:09:50,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:50,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:50,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:50,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-16 14:09:50,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604679935] [2020-09-16 14:09:50,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:09:50,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:50,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:09:50,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:09:50,635 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-16 14:09:51,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:51,401 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-16 14:09:51,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:09:51,402 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-16 14:09:51,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:51,403 INFO L225 Difference]: With dead ends: 103 [2020-09-16 14:09:51,403 INFO L226 Difference]: Without dead ends: 97 [2020-09-16 14:09:51,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-16 14:09:51,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-16 14:09:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-16 14:09:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-16 14:09:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-16 14:09:51,406 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-16 14:09:51,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:51,406 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-16 14:09:51,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:09:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-16 14:09:51,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:09:51,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:51,407 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:51,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-16 14:09:51,612 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:51,613 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-16 14:09:51,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:51,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694236054] [2020-09-16 14:09:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:51,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694236054] [2020-09-16 14:09:51,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515870454] [2020-09-16 14:09:51,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:51,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:09:51,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:51,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:51,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-16 14:09:51,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226502708] [2020-09-16 14:09:51,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:09:51,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:51,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:09:51,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:09:51,943 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-16 14:09:52,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:52,606 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-16 14:09:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-16 14:09:52,607 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-16 14:09:52,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:52,608 INFO L225 Difference]: With dead ends: 100 [2020-09-16 14:09:52,608 INFO L226 Difference]: Without dead ends: 94 [2020-09-16 14:09:52,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-16 14:09:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-16 14:09:52,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-16 14:09:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-16 14:09:52,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-16 14:09:52,611 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-16 14:09:52,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:52,611 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-16 14:09:52,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:09:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-16 14:09:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:09:52,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:52,612 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:52,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:52,814 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:52,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:52,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-16 14:09:52,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:52,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801554764] [2020-09-16 14:09:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:53,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801554764] [2020-09-16 14:09:53,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908934026] [2020-09-16 14:09:53,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:53,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:09:53,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:53,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:09:53,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:53,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:53,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:53,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-16 14:09:53,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607293038] [2020-09-16 14:09:53,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:09:53,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:53,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:09:53,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:09:53,158 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-16 14:09:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:54,025 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-16 14:09:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:09:54,026 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-16 14:09:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:54,026 INFO L225 Difference]: With dead ends: 99 [2020-09-16 14:09:54,026 INFO L226 Difference]: Without dead ends: 93 [2020-09-16 14:09:54,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-16 14:09:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-16 14:09:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-16 14:09:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-16 14:09:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-16 14:09:54,029 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-16 14:09:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:54,029 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-16 14:09:54,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:09:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-16 14:09:54,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:09:54,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:54,030 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:54,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-16 14:09:54,230 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:54,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:54,231 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-16 14:09:54,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:54,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041970310] [2020-09-16 14:09:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:54,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041970310] [2020-09-16 14:09:54,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083666455] [2020-09-16 14:09:54,464 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 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 [2020-09-16 14:09:54,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-16 14:09:54,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:54,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:09:54,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:54,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:54,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-16 14:09:54,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206592915] [2020-09-16 14:09:54,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:09:54,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:54,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:09:54,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:09:54,548 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-16 14:09:55,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:55,281 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-16 14:09:55,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 14:09:55,282 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-16 14:09:55,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:55,282 INFO L225 Difference]: With dead ends: 96 [2020-09-16 14:09:55,282 INFO L226 Difference]: Without dead ends: 90 [2020-09-16 14:09:55,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:09:55,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-16 14:09:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-16 14:09:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-16 14:09:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-16 14:09:55,286 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-16 14:09:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:55,286 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-16 14:09:55,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:09:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-16 14:09:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:09:55,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:55,287 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:55,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:55,489 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:55,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:55,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-16 14:09:55,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:55,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413524569] [2020-09-16 14:09:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:55,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413524569] [2020-09-16 14:09:55,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346208839] [2020-09-16 14:09:55,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:55,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:09:55,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:55,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:09:55,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:55,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:55,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:55,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-16 14:09:55,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930775451] [2020-09-16 14:09:55,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:09:55,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:55,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:09:55,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:09:55,829 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-16 14:09:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:56,796 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-16 14:09:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:09:56,797 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-16 14:09:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:56,798 INFO L225 Difference]: With dead ends: 95 [2020-09-16 14:09:56,798 INFO L226 Difference]: Without dead ends: 89 [2020-09-16 14:09:56,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:09:56,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-16 14:09:56,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-16 14:09:56,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-16 14:09:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-16 14:09:56,800 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-16 14:09:56,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:56,800 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-16 14:09:56,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:09:56,800 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-16 14:09:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:09:56,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:56,801 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:57,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:57,002 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:57,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-16 14:09:57,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:57,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565113679] [2020-09-16 14:09:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:57,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565113679] [2020-09-16 14:09:57,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125305034] [2020-09-16 14:09:57,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:09:57,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-16 14:09:57,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:57,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:09:57,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:57,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:57,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-16 14:09:57,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027132456] [2020-09-16 14:09:57,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:09:57,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:57,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:09:57,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:09:57,277 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-16 14:09:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:58,079 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-16 14:09:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:09:58,079 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-16 14:09:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:58,080 INFO L225 Difference]: With dead ends: 92 [2020-09-16 14:09:58,080 INFO L226 Difference]: Without dead ends: 86 [2020-09-16 14:09:58,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-16 14:09:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-16 14:09:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-16 14:09:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-16 14:09:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-16 14:09:58,083 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-16 14:09:58,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:58,084 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-16 14:09:58,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:09:58,084 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-16 14:09:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:09:58,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:58,085 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:58,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:58,293 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:58,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:58,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-16 14:09:58,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:58,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850437185] [2020-09-16 14:09:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:09:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:58,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850437185] [2020-09-16 14:09:58,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702176368] [2020-09-16 14:09:58,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:58,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-16 14:09:58,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:09:58,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:09:58,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:09:58,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:09:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:09:58,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:09:58,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-16 14:09:58,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814092645] [2020-09-16 14:09:58,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:09:58,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:09:58,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:09:58,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:09:58,626 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-16 14:09:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:09:59,732 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-16 14:09:59,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:09:59,733 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-16 14:09:59,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:09:59,733 INFO L225 Difference]: With dead ends: 91 [2020-09-16 14:09:59,733 INFO L226 Difference]: Without dead ends: 85 [2020-09-16 14:09:59,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-16 14:09:59,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-16 14:09:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-16 14:09:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-16 14:09:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-16 14:09:59,736 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-16 14:09:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:09:59,736 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-16 14:09:59,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:09:59,736 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-16 14:09:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:09:59,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:09:59,737 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:09:59,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:09:59,945 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:09:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:09:59,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-16 14:09:59,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:09:59,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566342549] [2020-09-16 14:09:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:09:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:00,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566342549] [2020-09-16 14:10:00,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213236754] [2020-09-16 14:10:00,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:00,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:10:00,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:00,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:00,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-16 14:10:00,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851481503] [2020-09-16 14:10:00,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:10:00,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:00,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:10:00,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-16 14:10:00,271 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-16 14:10:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:01,116 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-16 14:10:01,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-16 14:10:01,116 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-16 14:10:01,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:01,117 INFO L225 Difference]: With dead ends: 107 [2020-09-16 14:10:01,117 INFO L226 Difference]: Without dead ends: 101 [2020-09-16 14:10:01,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 14:10:01,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-16 14:10:01,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-16 14:10:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-16 14:10:01,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-16 14:10:01,121 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-16 14:10:01,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:01,121 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-16 14:10:01,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:10:01,121 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-16 14:10:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:10:01,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:01,122 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:01,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-16 14:10:01,330 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:01,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-16 14:10:01,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:01,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825617051] [2020-09-16 14:10:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:01,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825617051] [2020-09-16 14:10:01,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250143250] [2020-09-16 14:10:01,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:01,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:10:01,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:01,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:10:01,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:01,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:01,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:01,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-16 14:10:01,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344541569] [2020-09-16 14:10:01,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:10:01,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:01,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:10:01,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:10:01,658 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-16 14:10:02,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:02,775 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-09-16 14:10:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:10:02,775 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-16 14:10:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:02,776 INFO L225 Difference]: With dead ends: 88 [2020-09-16 14:10:02,776 INFO L226 Difference]: Without dead ends: 80 [2020-09-16 14:10:02,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-09-16 14:10:02,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-16 14:10:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-16 14:10:02,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-16 14:10:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-16 14:10:02,779 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-16 14:10:02,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:02,780 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-16 14:10:02,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:10:02,780 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-16 14:10:02,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-16 14:10:02,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:02,781 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:02,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-16 14:10:02,991 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:02,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:02,992 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-16 14:10:02,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:02,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988972013] [2020-09-16 14:10:02,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:03,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988972013] [2020-09-16 14:10:03,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808437502] [2020-09-16 14:10:03,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:03,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-16 14:10:03,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:03,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-16 14:10:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:03,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:10:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:03,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:03,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-16 14:10:03,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626750079] [2020-09-16 14:10:03,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:10:03,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:03,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:10:03,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:10:03,331 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-16 14:10:04,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:04,365 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-16 14:10:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-16 14:10:04,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-16 14:10:04,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:04,366 INFO L225 Difference]: With dead ends: 100 [2020-09-16 14:10:04,366 INFO L226 Difference]: Without dead ends: 95 [2020-09-16 14:10:04,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-16 14:10:04,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-16 14:10:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-16 14:10:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-16 14:10:04,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-16 14:10:04,369 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-16 14:10:04,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:04,370 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-16 14:10:04,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:10:04,370 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-16 14:10:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:04,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:04,371 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:04,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-16 14:10:04,574 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:04,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:04,575 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-16 14:10:04,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:04,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133853762] [2020-09-16 14:10:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:04,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133853762] [2020-09-16 14:10:04,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877829200] [2020-09-16 14:10:04,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:04,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:10:04,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:04,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:04,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:04,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:10:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:04,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:04,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-16 14:10:04,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160501908] [2020-09-16 14:10:04,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:04,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:04,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:04,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:04,944 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-16 14:10:06,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:06,095 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-16 14:10:06,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-16 14:10:06,096 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-16 14:10:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:06,097 INFO L225 Difference]: With dead ends: 84 [2020-09-16 14:10:06,097 INFO L226 Difference]: Without dead ends: 79 [2020-09-16 14:10:06,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-16 14:10:06,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-16 14:10:06,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-16 14:10:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-16 14:10:06,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-16 14:10:06,100 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-16 14:10:06,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:06,100 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-16 14:10:06,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-16 14:10:06,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:06,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:06,100 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:06,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-16 14:10:06,301 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:06,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:06,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-16 14:10:06,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:06,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898708658] [2020-09-16 14:10:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:06,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898708658] [2020-09-16 14:10:06,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380194736] [2020-09-16 14:10:06,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:06,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-16 14:10:06,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:06,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:06,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:06,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:06,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-16 14:10:06,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632114346] [2020-09-16 14:10:06,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:10:06,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:06,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:10:06,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:10:06,695 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-16 14:10:07,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:07,178 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-16 14:10:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:10:07,179 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-16 14:10:07,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:07,179 INFO L225 Difference]: With dead ends: 90 [2020-09-16 14:10:07,180 INFO L226 Difference]: Without dead ends: 84 [2020-09-16 14:10:07,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 14:10:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-16 14:10:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-16 14:10:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-16 14:10:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-16 14:10:07,182 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-16 14:10:07,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:07,183 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-16 14:10:07,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:10:07,184 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-16 14:10:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:07,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:07,184 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:07,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:07,388 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:07,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:07,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-16 14:10:07,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:07,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191959140] [2020-09-16 14:10:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:07,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191959140] [2020-09-16 14:10:07,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514573831] [2020-09-16 14:10:07,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:07,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-16 14:10:07,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:07,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:07,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:07,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:07,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:07,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-16 14:10:07,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381736787] [2020-09-16 14:10:07,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:07,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:07,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:07,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:07,823 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-16 14:10:08,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:08,320 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-16 14:10:08,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 14:10:08,321 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-16 14:10:08,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:08,322 INFO L225 Difference]: With dead ends: 106 [2020-09-16 14:10:08,322 INFO L226 Difference]: Without dead ends: 100 [2020-09-16 14:10:08,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:10:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-16 14:10:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-16 14:10:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-16 14:10:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-16 14:10:08,326 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-16 14:10:08,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:08,326 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-16 14:10:08,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:08,326 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-16 14:10:08,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:08,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:08,327 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:08,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-16 14:10:08,532 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:08,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:08,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-16 14:10:08,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:08,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912591462] [2020-09-16 14:10:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:08,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912591462] [2020-09-16 14:10:08,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951387748] [2020-09-16 14:10:08,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:08,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:08,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:08,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:08,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-16 14:10:08,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971349094] [2020-09-16 14:10:08,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:10:08,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:08,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:10:08,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:10:08,914 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-16 14:10:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:09,486 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-16 14:10:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:10:09,487 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-16 14:10:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:09,487 INFO L225 Difference]: With dead ends: 107 [2020-09-16 14:10:09,488 INFO L226 Difference]: Without dead ends: 101 [2020-09-16 14:10:09,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:10:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-16 14:10:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-16 14:10:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-16 14:10:09,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-16 14:10:09,490 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-16 14:10:09,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:09,491 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-16 14:10:09,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:10:09,491 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-16 14:10:09,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:09,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:09,491 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:09,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-16 14:10:09,699 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:09,700 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-16 14:10:09,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:09,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233505649] [2020-09-16 14:10:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:10,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233505649] [2020-09-16 14:10:10,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200467004] [2020-09-16 14:10:10,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:10,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:10:10,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:10,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:10,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:10,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:10,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:10,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-16 14:10:10,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495092044] [2020-09-16 14:10:10,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:10,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:10,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:10,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:10,114 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-16 14:10:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:10,786 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-16 14:10:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:10:10,787 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-16 14:10:10,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:10,787 INFO L225 Difference]: With dead ends: 119 [2020-09-16 14:10:10,787 INFO L226 Difference]: Without dead ends: 113 [2020-09-16 14:10:10,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-16 14:10:10,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-16 14:10:10,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-16 14:10:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-16 14:10:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-16 14:10:10,789 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-16 14:10:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:10,789 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-16 14:10:10,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-16 14:10:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:10,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:10,790 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:10,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-16 14:10:10,991 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:10,991 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-16 14:10:10,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:10,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850854658] [2020-09-16 14:10:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:11,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850854658] [2020-09-16 14:10:11,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022026777] [2020-09-16 14:10:11,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:11,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-16 14:10:11,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:11,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:11,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:11,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:11,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-16 14:10:11,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033213562] [2020-09-16 14:10:11,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:10:11,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:11,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:10:11,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:10:11,365 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-16 14:10:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:12,005 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-16 14:10:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-16 14:10:12,006 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-16 14:10:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:12,007 INFO L225 Difference]: With dead ends: 119 [2020-09-16 14:10:12,007 INFO L226 Difference]: Without dead ends: 113 [2020-09-16 14:10:12,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-16 14:10:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-16 14:10:12,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-16 14:10:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-16 14:10:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-16 14:10:12,009 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-16 14:10:12,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:12,010 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-16 14:10:12,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:10:12,010 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-16 14:10:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:12,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:12,010 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:12,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:12,212 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:12,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:12,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-16 14:10:12,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:12,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579830656] [2020-09-16 14:10:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:12,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579830656] [2020-09-16 14:10:12,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242217033] [2020-09-16 14:10:12,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:12,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:10:12,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:12,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:12,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:12,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:12,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:12,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-16 14:10:12,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210593191] [2020-09-16 14:10:12,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:12,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:12,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:12,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:12,605 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-16 14:10:13,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:13,339 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-16 14:10:13,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:10:13,340 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-16 14:10:13,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:13,341 INFO L225 Difference]: With dead ends: 116 [2020-09-16 14:10:13,341 INFO L226 Difference]: Without dead ends: 110 [2020-09-16 14:10:13,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:10:13,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-16 14:10:13,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-16 14:10:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-16 14:10:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-16 14:10:13,344 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-16 14:10:13,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:13,344 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-16 14:10:13,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:13,344 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-16 14:10:13,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:13,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:13,345 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:13,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:13,546 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:13,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:13,547 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-16 14:10:13,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:13,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750392352] [2020-09-16 14:10:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:13,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750392352] [2020-09-16 14:10:13,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045917164] [2020-09-16 14:10:13,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:13,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-16 14:10:13,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:13,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:13,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:13,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:13,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-16 14:10:13,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586719914] [2020-09-16 14:10:13,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:10:13,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:13,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:10:13,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:10:13,917 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-16 14:10:14,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:14,612 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-16 14:10:14,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 14:10:14,613 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-16 14:10:14,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:14,614 INFO L225 Difference]: With dead ends: 117 [2020-09-16 14:10:14,614 INFO L226 Difference]: Without dead ends: 111 [2020-09-16 14:10:14,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-16 14:10:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-16 14:10:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-16 14:10:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-16 14:10:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-16 14:10:14,617 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-16 14:10:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:14,617 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-16 14:10:14,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:10:14,617 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-16 14:10:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:14,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:14,617 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:14,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:14,818 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:14,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:14,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-16 14:10:14,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:14,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768422865] [2020-09-16 14:10:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:15,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768422865] [2020-09-16 14:10:15,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944838503] [2020-09-16 14:10:15,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:15,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-16 14:10:15,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:15,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:15,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:15,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:15,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:15,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-16 14:10:15,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009796504] [2020-09-16 14:10:15,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:15,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:15,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:15,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:15,224 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-16 14:10:16,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:16,039 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-16 14:10:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:10:16,040 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-16 14:10:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:16,040 INFO L225 Difference]: With dead ends: 114 [2020-09-16 14:10:16,040 INFO L226 Difference]: Without dead ends: 108 [2020-09-16 14:10:16,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-16 14:10:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-16 14:10:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-16 14:10:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-16 14:10:16,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-16 14:10:16,043 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-16 14:10:16,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:16,044 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-16 14:10:16,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:16,044 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-16 14:10:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:16,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:16,044 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:16,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-16 14:10:16,245 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:16,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:16,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-16 14:10:16,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:16,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665337722] [2020-09-16 14:10:16,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:16,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665337722] [2020-09-16 14:10:16,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673349471] [2020-09-16 14:10:16,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:16,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:16,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:16,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:16,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-16 14:10:16,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465221915] [2020-09-16 14:10:16,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:10:16,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:16,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:10:16,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:10:16,614 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-16 14:10:17,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:17,403 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-16 14:10:17,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:10:17,404 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-16 14:10:17,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:17,405 INFO L225 Difference]: With dead ends: 115 [2020-09-16 14:10:17,405 INFO L226 Difference]: Without dead ends: 109 [2020-09-16 14:10:17,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:10:17,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-16 14:10:17,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-16 14:10:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-16 14:10:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-16 14:10:17,408 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-16 14:10:17,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:17,408 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-16 14:10:17,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:10:17,408 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-16 14:10:17,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:17,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:17,408 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:17,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:17,609 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:17,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:17,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-16 14:10:17,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:17,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125370885] [2020-09-16 14:10:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:17,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125370885] [2020-09-16 14:10:17,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265502117] [2020-09-16 14:10:17,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:17,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:10:17,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:17,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:17,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:17,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:17,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:17,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-16 14:10:17,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713326762] [2020-09-16 14:10:17,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:17,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:17,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:17,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:17,984 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-16 14:10:18,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:18,933 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-16 14:10:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:10:18,934 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-16 14:10:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:18,935 INFO L225 Difference]: With dead ends: 112 [2020-09-16 14:10:18,935 INFO L226 Difference]: Without dead ends: 106 [2020-09-16 14:10:18,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 14:10:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-16 14:10:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-16 14:10:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-16 14:10:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-16 14:10:18,937 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-16 14:10:18,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:18,937 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-16 14:10:18,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:18,937 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-16 14:10:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:18,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:18,938 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:19,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-16 14:10:19,139 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:19,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:19,139 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-16 14:10:19,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:19,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898733186] [2020-09-16 14:10:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:19,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898733186] [2020-09-16 14:10:19,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837376055] [2020-09-16 14:10:19,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:19,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-16 14:10:19,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:19,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:19,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:19,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:19,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-16 14:10:19,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069651844] [2020-09-16 14:10:19,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:10:19,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:19,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:10:19,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:10:19,480 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-16 14:10:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:20,325 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-16 14:10:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-16 14:10:20,326 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-16 14:10:20,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:20,327 INFO L225 Difference]: With dead ends: 113 [2020-09-16 14:10:20,327 INFO L226 Difference]: Without dead ends: 107 [2020-09-16 14:10:20,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-16 14:10:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-16 14:10:20,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-16 14:10:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-16 14:10:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-16 14:10:20,330 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-16 14:10:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:20,331 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-16 14:10:20,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:10:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-16 14:10:20,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:20,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:20,331 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:20,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-16 14:10:20,532 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:20,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-16 14:10:20,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:20,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094147638] [2020-09-16 14:10:20,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:20,793 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:20,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094147638] [2020-09-16 14:10:20,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060085533] [2020-09-16 14:10:20,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:20,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:10:20,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:20,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:20,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:20,883 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:20,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:20,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-16 14:10:20,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192119287] [2020-09-16 14:10:20,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:20,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:20,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:20,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:20,901 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-16 14:10:21,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:21,931 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-16 14:10:21,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:10:21,932 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-16 14:10:21,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:21,932 INFO L225 Difference]: With dead ends: 110 [2020-09-16 14:10:21,932 INFO L226 Difference]: Without dead ends: 104 [2020-09-16 14:10:21,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-16 14:10:21,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-16 14:10:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-16 14:10:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-16 14:10:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-16 14:10:21,935 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-16 14:10:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:21,936 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-16 14:10:21,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:21,936 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-16 14:10:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:21,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:21,936 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:22,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-16 14:10:22,137 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:22,138 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-16 14:10:22,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:22,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381877646] [2020-09-16 14:10:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:22,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381877646] [2020-09-16 14:10:22,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488228866] [2020-09-16 14:10:22,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:22,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-16 14:10:22,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:22,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:22,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:22,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:22,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-16 14:10:22,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214690639] [2020-09-16 14:10:22,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:10:22,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:22,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:10:22,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:10:22,484 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-16 14:10:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:23,408 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-16 14:10:23,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-16 14:10:23,409 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-16 14:10:23,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:23,409 INFO L225 Difference]: With dead ends: 111 [2020-09-16 14:10:23,410 INFO L226 Difference]: Without dead ends: 105 [2020-09-16 14:10:23,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-16 14:10:23,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-16 14:10:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-16 14:10:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-16 14:10:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-16 14:10:23,414 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-16 14:10:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:23,414 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-16 14:10:23,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:10:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-16 14:10:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:23,414 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:23,415 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:23,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:23,615 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:23,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:23,616 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-16 14:10:23,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:23,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029832834] [2020-09-16 14:10:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:23,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029832834] [2020-09-16 14:10:23,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471661901] [2020-09-16 14:10:23,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:23,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-16 14:10:23,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:23,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:23,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:23,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:23,985 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:23,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:23,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-16 14:10:23,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129035966] [2020-09-16 14:10:23,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:23,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:23,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:23,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:23,987 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-16 14:10:25,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:25,128 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-16 14:10:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:10:25,129 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-16 14:10:25,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:25,129 INFO L225 Difference]: With dead ends: 108 [2020-09-16 14:10:25,130 INFO L226 Difference]: Without dead ends: 102 [2020-09-16 14:10:25,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-16 14:10:25,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-16 14:10:25,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-16 14:10:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-16 14:10:25,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-16 14:10:25,132 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-16 14:10:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:25,132 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-16 14:10:25,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-16 14:10:25,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:25,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:25,132 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:25,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-16 14:10:25,333 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:25,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-16 14:10:25,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:25,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460902174] [2020-09-16 14:10:25,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:25,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460902174] [2020-09-16 14:10:25,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658850879] [2020-09-16 14:10:25,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:25,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:25,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:25,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:25,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-16 14:10:25,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761755913] [2020-09-16 14:10:25,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:10:25,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:25,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:10:25,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:10:25,647 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-16 14:10:26,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:26,629 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-16 14:10:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-16 14:10:26,630 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-16 14:10:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:26,631 INFO L225 Difference]: With dead ends: 128 [2020-09-16 14:10:26,631 INFO L226 Difference]: Without dead ends: 122 [2020-09-16 14:10:26,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-16 14:10:26,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-16 14:10:26,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-16 14:10:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-16 14:10:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-16 14:10:26,634 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-16 14:10:26,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:26,634 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-16 14:10:26,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:10:26,634 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-16 14:10:26,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 14:10:26,635 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:26,635 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:26,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:26,835 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:26,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:26,836 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-16 14:10:26,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:26,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441471055] [2020-09-16 14:10:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:27,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441471055] [2020-09-16 14:10:27,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420999906] [2020-09-16 14:10:27,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:27,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:10:27,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:27,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-16 14:10:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:27,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:27,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:27,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-16 14:10:27,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539424608] [2020-09-16 14:10:27,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:27,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:27,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:27,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:27,192 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-16 14:10:28,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:28,382 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-16 14:10:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:10:28,383 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-16 14:10:28,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:28,383 INFO L225 Difference]: With dead ends: 109 [2020-09-16 14:10:28,383 INFO L226 Difference]: Without dead ends: 101 [2020-09-16 14:10:28,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-09-16 14:10:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-16 14:10:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-16 14:10:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-16 14:10:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-16 14:10:28,386 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-16 14:10:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:28,386 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-16 14:10:28,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-16 14:10:28,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:28,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:28,386 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:28,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:28,587 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:28,589 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-16 14:10:28,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:28,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828407237] [2020-09-16 14:10:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:28,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828407237] [2020-09-16 14:10:28,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735541125] [2020-09-16 14:10:28,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:29,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-16 14:10:29,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:29,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:29,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:29,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:29,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-16 14:10:29,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401277078] [2020-09-16 14:10:29,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:29,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:29,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:29,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:29,022 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-16 14:10:29,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:29,570 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-16 14:10:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 14:10:29,571 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-16 14:10:29,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:29,572 INFO L225 Difference]: With dead ends: 124 [2020-09-16 14:10:29,572 INFO L226 Difference]: Without dead ends: 118 [2020-09-16 14:10:29,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:10:29,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-16 14:10:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-16 14:10:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-16 14:10:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-16 14:10:29,575 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-16 14:10:29,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:29,576 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-16 14:10:29,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-16 14:10:29,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:29,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:29,576 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:29,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:29,785 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:29,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:29,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-16 14:10:29,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:29,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462738338] [2020-09-16 14:10:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:30,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462738338] [2020-09-16 14:10:30,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706128238] [2020-09-16 14:10:30,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:30,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:10:30,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:30,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:30,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:30,236 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:30,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:30,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-16 14:10:30,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522361634] [2020-09-16 14:10:30,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:10:30,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:30,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:10:30,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:10:30,257 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-16 14:10:30,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:30,939 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-16 14:10:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:10:30,940 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-16 14:10:30,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:30,941 INFO L225 Difference]: With dead ends: 121 [2020-09-16 14:10:30,941 INFO L226 Difference]: Without dead ends: 115 [2020-09-16 14:10:30,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-16 14:10:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-16 14:10:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-16 14:10:30,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-16 14:10:30,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-16 14:10:30,944 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-16 14:10:30,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:30,944 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-16 14:10:30,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:10:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-16 14:10:30,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:30,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:30,945 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:31,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:31,146 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:31,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-16 14:10:31,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:31,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662296298] [2020-09-16 14:10:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:31,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662296298] [2020-09-16 14:10:31,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948094268] [2020-09-16 14:10:31,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:31,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-16 14:10:31,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:31,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:31,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:31,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:31,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-16 14:10:31,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16169305] [2020-09-16 14:10:31,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:31,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:31,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:31,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:31,564 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-16 14:10:32,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:32,196 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-16 14:10:32,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:10:32,197 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-16 14:10:32,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:32,198 INFO L225 Difference]: With dead ends: 118 [2020-09-16 14:10:32,198 INFO L226 Difference]: Without dead ends: 112 [2020-09-16 14:10:32,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-16 14:10:32,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-16 14:10:32,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-16 14:10:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-16 14:10:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-16 14:10:32,201 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-16 14:10:32,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:32,201 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-16 14:10:32,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-16 14:10:32,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:32,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:32,201 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:32,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:32,403 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:32,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:32,403 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-16 14:10:32,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:32,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779770128] [2020-09-16 14:10:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:32,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779770128] [2020-09-16 14:10:32,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956413966] [2020-09-16 14:10:32,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:32,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-16 14:10:32,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:32,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:32,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:32,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:32,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:32,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-16 14:10:32,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074141342] [2020-09-16 14:10:32,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:10:32,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:32,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:10:32,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:10:32,853 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-16 14:10:33,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:33,632 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-16 14:10:33,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:10:33,633 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-16 14:10:33,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:33,634 INFO L225 Difference]: With dead ends: 117 [2020-09-16 14:10:33,634 INFO L226 Difference]: Without dead ends: 111 [2020-09-16 14:10:33,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-16 14:10:33,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-16 14:10:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-16 14:10:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-16 14:10:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-16 14:10:33,637 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-16 14:10:33,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:33,637 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-16 14:10:33,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:10:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-16 14:10:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:33,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:33,638 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:33,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-16 14:10:33,839 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:33,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:33,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-16 14:10:33,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:33,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881277015] [2020-09-16 14:10:33,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:34,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881277015] [2020-09-16 14:10:34,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112137307] [2020-09-16 14:10:34,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:34,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:34,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:34,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:34,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-16 14:10:34,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967721697] [2020-09-16 14:10:34,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:34,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:34,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:34,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:34,240 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-16 14:10:34,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:34,944 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-16 14:10:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-16 14:10:34,945 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-16 14:10:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:34,945 INFO L225 Difference]: With dead ends: 114 [2020-09-16 14:10:34,945 INFO L226 Difference]: Without dead ends: 108 [2020-09-16 14:10:34,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:10:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-16 14:10:34,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-16 14:10:34,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-16 14:10:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-16 14:10:34,947 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-16 14:10:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:34,947 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-16 14:10:34,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-16 14:10:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:34,948 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:34,948 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:35,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-16 14:10:35,151 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:35,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:35,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-16 14:10:35,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:35,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363794124] [2020-09-16 14:10:35,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:35,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363794124] [2020-09-16 14:10:35,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919915091] [2020-09-16 14:10:35,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:35,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:10:35,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:35,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:35,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:35,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:35,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:35,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-16 14:10:35,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142797825] [2020-09-16 14:10:35,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:10:35,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:35,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:10:35,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:10:35,572 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-16 14:10:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:36,479 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-16 14:10:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:10:36,480 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-16 14:10:36,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:36,480 INFO L225 Difference]: With dead ends: 113 [2020-09-16 14:10:36,480 INFO L226 Difference]: Without dead ends: 107 [2020-09-16 14:10:36,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:10:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-16 14:10:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-16 14:10:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-16 14:10:36,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-16 14:10:36,483 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-16 14:10:36,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:36,486 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-16 14:10:36,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:10:36,486 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-16 14:10:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:36,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:36,487 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:36,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-16 14:10:36,695 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:36,696 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-16 14:10:36,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:36,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169334614] [2020-09-16 14:10:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:36,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169334614] [2020-09-16 14:10:36,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316135374] [2020-09-16 14:10:36,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:37,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-16 14:10:37,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:37,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:37,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:37,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:37,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-16 14:10:37,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177232963] [2020-09-16 14:10:37,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:37,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:37,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:37,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:37,081 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-16 14:10:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:37,861 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-16 14:10:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 14:10:37,862 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-16 14:10:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:37,863 INFO L225 Difference]: With dead ends: 110 [2020-09-16 14:10:37,863 INFO L226 Difference]: Without dead ends: 104 [2020-09-16 14:10:37,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-16 14:10:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-16 14:10:37,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-16 14:10:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-16 14:10:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-16 14:10:37,867 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-16 14:10:37,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:37,867 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-16 14:10:37,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-16 14:10:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:37,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:37,868 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:38,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-16 14:10:38,077 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:38,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:38,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-16 14:10:38,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:38,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550086897] [2020-09-16 14:10:38,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:38,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550086897] [2020-09-16 14:10:38,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893402879] [2020-09-16 14:10:38,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:38,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:10:38,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:38,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:38,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:38,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:38,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:38,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-16 14:10:38,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921597173] [2020-09-16 14:10:38,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:10:38,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:38,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:10:38,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:10:38,478 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-16 14:10:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:39,489 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-16 14:10:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:10:39,490 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-16 14:10:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:39,491 INFO L225 Difference]: With dead ends: 109 [2020-09-16 14:10:39,491 INFO L226 Difference]: Without dead ends: 103 [2020-09-16 14:10:39,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-16 14:10:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-16 14:10:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-16 14:10:39,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-16 14:10:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-16 14:10:39,493 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-16 14:10:39,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:39,493 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-16 14:10:39,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:10:39,494 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-16 14:10:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:39,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:39,494 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:39,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:39,695 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:39,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:39,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-16 14:10:39,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:39,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112379896] [2020-09-16 14:10:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:40,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112379896] [2020-09-16 14:10:40,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059621975] [2020-09-16 14:10:40,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:10:40,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-16 14:10:40,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:40,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:40,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:40,091 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:40,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:40,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-16 14:10:40,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366173059] [2020-09-16 14:10:40,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:40,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:40,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:40,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:40,092 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-16 14:10:40,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:40,974 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-16 14:10:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:10:40,975 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-16 14:10:40,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:40,976 INFO L225 Difference]: With dead ends: 106 [2020-09-16 14:10:40,976 INFO L226 Difference]: Without dead ends: 100 [2020-09-16 14:10:40,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 14:10:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-16 14:10:40,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-16 14:10:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-16 14:10:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-16 14:10:40,978 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-16 14:10:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:40,979 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-16 14:10:40,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:40,979 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-16 14:10:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:40,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:40,979 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:41,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-16 14:10:41,180 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:41,180 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-16 14:10:41,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:41,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898115482] [2020-09-16 14:10:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:41,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898115482] [2020-09-16 14:10:41,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870284255] [2020-09-16 14:10:41,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:41,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-16 14:10:41,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:41,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:41,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:41,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:41,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:41,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-16 14:10:41,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132279058] [2020-09-16 14:10:41,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:10:41,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:41,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:10:41,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:10:41,595 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-16 14:10:42,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:42,702 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-16 14:10:42,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:10:42,703 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-16 14:10:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:42,703 INFO L225 Difference]: With dead ends: 105 [2020-09-16 14:10:42,703 INFO L226 Difference]: Without dead ends: 99 [2020-09-16 14:10:42,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-16 14:10:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-16 14:10:42,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-16 14:10:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-16 14:10:42,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-16 14:10:42,707 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-16 14:10:42,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:42,707 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-16 14:10:42,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:10:42,707 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-16 14:10:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:42,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:42,708 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:42,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:42,915 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:42,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:42,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-16 14:10:42,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:42,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549808094] [2020-09-16 14:10:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:43,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549808094] [2020-09-16 14:10:43,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827969197] [2020-09-16 14:10:43,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:43,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:43,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:43,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-16 14:10:43,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430422670] [2020-09-16 14:10:43,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:43,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:43,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:43,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:43,286 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-16 14:10:44,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:44,233 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-16 14:10:44,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-16 14:10:44,234 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-16 14:10:44,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:44,234 INFO L225 Difference]: With dead ends: 102 [2020-09-16 14:10:44,235 INFO L226 Difference]: Without dead ends: 96 [2020-09-16 14:10:44,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-16 14:10:44,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-16 14:10:44,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-16 14:10:44,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-16 14:10:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-16 14:10:44,237 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-16 14:10:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:44,237 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-16 14:10:44,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:44,237 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-16 14:10:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:44,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:44,238 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:44,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:44,439 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:44,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:44,439 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-16 14:10:44,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:44,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907379283] [2020-09-16 14:10:44,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:44,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907379283] [2020-09-16 14:10:44,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759190778] [2020-09-16 14:10:44,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:44,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:10:44,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:44,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:44,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:44,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:44,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:44,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-16 14:10:44,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261511955] [2020-09-16 14:10:44,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:10:44,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:44,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:10:44,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:10:44,841 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-16 14:10:46,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:46,078 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-16 14:10:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:10:46,079 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-16 14:10:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:46,080 INFO L225 Difference]: With dead ends: 101 [2020-09-16 14:10:46,080 INFO L226 Difference]: Without dead ends: 95 [2020-09-16 14:10:46,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-16 14:10:46,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-16 14:10:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-16 14:10:46,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-16 14:10:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-16 14:10:46,083 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-16 14:10:46,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:46,083 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-16 14:10:46,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:10:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-16 14:10:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:46,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:46,084 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:46,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-16 14:10:46,293 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:46,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:46,294 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-16 14:10:46,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:46,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764855439] [2020-09-16 14:10:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:46,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764855439] [2020-09-16 14:10:46,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583878331] [2020-09-16 14:10:46,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:46,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-16 14:10:46,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:46,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:46,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:46,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:46,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-16 14:10:46,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983423027] [2020-09-16 14:10:46,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:46,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:46,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:46,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:46,671 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-16 14:10:47,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:47,692 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-16 14:10:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-16 14:10:47,693 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-16 14:10:47,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:47,693 INFO L225 Difference]: With dead ends: 98 [2020-09-16 14:10:47,693 INFO L226 Difference]: Without dead ends: 92 [2020-09-16 14:10:47,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-16 14:10:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-16 14:10:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-16 14:10:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-16 14:10:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-16 14:10:47,696 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-16 14:10:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:47,697 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-16 14:10:47,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-16 14:10:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:47,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:47,697 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:47,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:47,898 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:47,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:47,899 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-16 14:10:47,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:47,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809471738] [2020-09-16 14:10:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:48,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809471738] [2020-09-16 14:10:48,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079708904] [2020-09-16 14:10:48,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:48,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:10:48,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:48,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:48,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:48,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:48,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:48,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-16 14:10:48,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362196792] [2020-09-16 14:10:48,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:10:48,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:48,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:10:48,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:10:48,296 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-16 14:10:49,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:49,633 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-16 14:10:49,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:10:49,634 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-16 14:10:49,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:49,635 INFO L225 Difference]: With dead ends: 97 [2020-09-16 14:10:49,635 INFO L226 Difference]: Without dead ends: 91 [2020-09-16 14:10:49,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-16 14:10:49,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-16 14:10:49,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-16 14:10:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-16 14:10:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-16 14:10:49,638 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-16 14:10:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:49,638 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-16 14:10:49,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:10:49,639 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-16 14:10:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:49,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:49,639 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:49,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-16 14:10:49,840 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:49,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:49,840 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-16 14:10:49,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:49,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573894177] [2020-09-16 14:10:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:50,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573894177] [2020-09-16 14:10:50,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116492702] [2020-09-16 14:10:50,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:50,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-16 14:10:50,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:50,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:50,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:50,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:50,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-16 14:10:50,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611987983] [2020-09-16 14:10:50,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:10:50,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:50,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:10:50,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:10:50,210 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-16 14:10:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:51,305 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-16 14:10:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-16 14:10:51,306 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-16 14:10:51,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:51,306 INFO L225 Difference]: With dead ends: 113 [2020-09-16 14:10:51,307 INFO L226 Difference]: Without dead ends: 107 [2020-09-16 14:10:51,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-16 14:10:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-16 14:10:51,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-16 14:10:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-16 14:10:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-16 14:10:51,310 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-16 14:10:51,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:51,310 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-16 14:10:51,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:10:51,310 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-16 14:10:51,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:51,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:51,311 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:51,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-16 14:10:51,512 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:51,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:51,512 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-16 14:10:51,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:51,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088887181] [2020-09-16 14:10:51,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:51,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088887181] [2020-09-16 14:10:51,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109011166] [2020-09-16 14:10:51,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:51,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-16 14:10:51,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:51,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:51,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:51,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:51,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:51,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-16 14:10:51,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246898367] [2020-09-16 14:10:51,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:10:51,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:51,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:10:51,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:10:51,919 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-16 14:10:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:53,291 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-09-16 14:10:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-16 14:10:53,292 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-16 14:10:53,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:53,293 INFO L225 Difference]: With dead ends: 94 [2020-09-16 14:10:53,293 INFO L226 Difference]: Without dead ends: 86 [2020-09-16 14:10:53,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-09-16 14:10:53,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-16 14:10:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-09-16 14:10:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-16 14:10:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-16 14:10:53,295 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-16 14:10:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:53,295 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-16 14:10:53,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:10:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-16 14:10:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 14:10:53,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:53,296 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:53,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-16 14:10:53,497 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:53,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-16 14:10:53,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:53,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986696231] [2020-09-16 14:10:53,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:53,769 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:53,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986696231] [2020-09-16 14:10:53,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944905626] [2020-09-16 14:10:53,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:53,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-16 14:10:53,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:53,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:10:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:53,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:53,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-16 14:10:53,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548203571] [2020-09-16 14:10:53,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:10:53,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:53,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:10:53,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:10:53,889 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-16 14:10:55,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:55,191 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-16 14:10:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-16 14:10:55,192 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-16 14:10:55,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:55,193 INFO L225 Difference]: With dead ends: 108 [2020-09-16 14:10:55,193 INFO L226 Difference]: Without dead ends: 103 [2020-09-16 14:10:55,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-16 14:10:55,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-16 14:10:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-16 14:10:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-16 14:10:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-16 14:10:55,196 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-16 14:10:55,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:55,196 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-16 14:10:55,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:10:55,196 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-16 14:10:55,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:10:55,196 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:55,196 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:55,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-16 14:10:55,397 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-16 14:10:55,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:55,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233927290] [2020-09-16 14:10:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:55,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233927290] [2020-09-16 14:10:55,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790693454] [2020-09-16 14:10:55,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:55,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:10:55,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:55,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:10:55,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:55,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:10:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:55,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:55,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-16 14:10:55,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398058846] [2020-09-16 14:10:55,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:10:55,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:55,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:10:55,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:10:55,827 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-16 14:10:57,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:57,245 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-16 14:10:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-16 14:10:57,246 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-16 14:10:57,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:57,246 INFO L225 Difference]: With dead ends: 90 [2020-09-16 14:10:57,246 INFO L226 Difference]: Without dead ends: 85 [2020-09-16 14:10:57,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-16 14:10:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-16 14:10:57,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-16 14:10:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-16 14:10:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-16 14:10:57,249 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-16 14:10:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:57,249 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-16 14:10:57,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:10:57,249 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-16 14:10:57,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:10:57,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:57,250 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:57,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:57,450 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:57,451 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-16 14:10:57,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:57,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765355554] [2020-09-16 14:10:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:57,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765355554] [2020-09-16 14:10:57,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896125576] [2020-09-16 14:10:57,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:57,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-16 14:10:57,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:57,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:10:57,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:57,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:57,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-16 14:10:57,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43997091] [2020-09-16 14:10:57,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:10:57,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:57,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:10:57,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:10:57,922 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-16 14:10:58,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:58,528 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-16 14:10:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 14:10:58,529 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-16 14:10:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:58,529 INFO L225 Difference]: With dead ends: 96 [2020-09-16 14:10:58,530 INFO L226 Difference]: Without dead ends: 90 [2020-09-16 14:10:58,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:10:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-16 14:10:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-16 14:10:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-16 14:10:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-16 14:10:58,533 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-16 14:10:58,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:58,533 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-16 14:10:58,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:10:58,533 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-16 14:10:58,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:10:58,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:58,534 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:10:58,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:58,741 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:10:58,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:10:58,742 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-16 14:10:58,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:10:58,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145685673] [2020-09-16 14:10:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:10:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:10:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:59,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145685673] [2020-09-16 14:10:59,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356525151] [2020-09-16 14:10:59,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:10:59,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:10:59,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:10:59,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:10:59,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:10:59,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:10:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:10:59,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:10:59,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-16 14:10:59,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354520178] [2020-09-16 14:10:59,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:10:59,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:10:59,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:10:59,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:10:59,242 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-16 14:10:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:10:59,866 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-16 14:10:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:10:59,867 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-16 14:10:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:10:59,868 INFO L225 Difference]: With dead ends: 114 [2020-09-16 14:10:59,868 INFO L226 Difference]: Without dead ends: 108 [2020-09-16 14:10:59,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-16 14:10:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-16 14:10:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-16 14:10:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-16 14:10:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-16 14:10:59,870 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-16 14:10:59,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:10:59,871 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-16 14:10:59,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:10:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-16 14:10:59,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:10:59,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:10:59,871 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:00,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:00,072 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:00,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:00,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-16 14:11:00,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:00,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985708119] [2020-09-16 14:11:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:00,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985708119] [2020-09-16 14:11:00,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318558398] [2020-09-16 14:11:00,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:00,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-16 14:11:00,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:00,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:00,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:00,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:00,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-16 14:11:00,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605502206] [2020-09-16 14:11:00,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:11:00,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:00,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:11:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:11:00,542 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-16 14:11:01,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:01,242 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-16 14:11:01,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-16 14:11:01,243 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-16 14:11:01,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:01,244 INFO L225 Difference]: With dead ends: 115 [2020-09-16 14:11:01,244 INFO L226 Difference]: Without dead ends: 109 [2020-09-16 14:11:01,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:11:01,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-16 14:11:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-16 14:11:01,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-16 14:11:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-16 14:11:01,246 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-16 14:11:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:01,247 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-16 14:11:01,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:11:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-16 14:11:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:01,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:01,247 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:01,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:01,448 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:01,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:01,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-16 14:11:01,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:01,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830132506] [2020-09-16 14:11:01,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:01,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830132506] [2020-09-16 14:11:01,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145710919] [2020-09-16 14:11:01,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:01,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-16 14:11:01,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:01,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:01,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:01,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:01,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:01,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-16 14:11:01,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683136237] [2020-09-16 14:11:01,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:01,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:01,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:01,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:01,953 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-16 14:11:02,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:02,708 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-16 14:11:02,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:11:02,709 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-16 14:11:02,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:02,709 INFO L225 Difference]: With dead ends: 129 [2020-09-16 14:11:02,709 INFO L226 Difference]: Without dead ends: 123 [2020-09-16 14:11:02,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-16 14:11:02,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-16 14:11:02,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-16 14:11:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-16 14:11:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-16 14:11:02,712 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-16 14:11:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:02,713 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-16 14:11:02,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-16 14:11:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:02,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:02,714 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:02,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:02,922 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:02,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:02,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-16 14:11:02,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:02,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051463668] [2020-09-16 14:11:02,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:03,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051463668] [2020-09-16 14:11:03,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257049364] [2020-09-16 14:11:03,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:03,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:03,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:03,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:03,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-16 14:11:03,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047089835] [2020-09-16 14:11:03,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:11:03,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:03,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:11:03,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:11:03,361 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-16 14:11:04,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:04,164 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-16 14:11:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 14:11:04,165 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-16 14:11:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:04,166 INFO L225 Difference]: With dead ends: 129 [2020-09-16 14:11:04,166 INFO L226 Difference]: Without dead ends: 123 [2020-09-16 14:11:04,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:11:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-16 14:11:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-16 14:11:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-16 14:11:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-16 14:11:04,169 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-16 14:11:04,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:04,170 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-16 14:11:04,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:11:04,170 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-16 14:11:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:04,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:04,170 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:04,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:04,371 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:04,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:04,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-16 14:11:04,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:04,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022132281] [2020-09-16 14:11:04,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:04,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022132281] [2020-09-16 14:11:04,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809853048] [2020-09-16 14:11:04,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:11:04,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:11:04,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:04,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:04,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:04,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:04,846 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:04,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:04,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-16 14:11:04,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821433058] [2020-09-16 14:11:04,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:04,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:04,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:04,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:04,847 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-16 14:11:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:05,753 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-16 14:11:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:11:05,754 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-16 14:11:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:05,755 INFO L225 Difference]: With dead ends: 126 [2020-09-16 14:11:05,755 INFO L226 Difference]: Without dead ends: 120 [2020-09-16 14:11:05,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 14:11:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-16 14:11:05,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-16 14:11:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-16 14:11:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-16 14:11:05,758 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-16 14:11:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:05,759 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-16 14:11:05,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-16 14:11:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:05,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:05,759 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:05,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:05,960 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:05,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:05,961 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-16 14:11:05,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:05,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70844615] [2020-09-16 14:11:05,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:06,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70844615] [2020-09-16 14:11:06,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140800923] [2020-09-16 14:11:06,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:11:06,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-16 14:11:06,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:06,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:06,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:06,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:06,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-16 14:11:06,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185924026] [2020-09-16 14:11:06,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:11:06,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:06,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:11:06,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:11:06,401 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-16 14:11:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:07,278 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-16 14:11:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:11:07,279 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-16 14:11:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:07,280 INFO L225 Difference]: With dead ends: 127 [2020-09-16 14:11:07,280 INFO L226 Difference]: Without dead ends: 121 [2020-09-16 14:11:07,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-16 14:11:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-16 14:11:07,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-16 14:11:07,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-16 14:11:07,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-16 14:11:07,283 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-16 14:11:07,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:07,283 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-16 14:11:07,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:11:07,284 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-16 14:11:07,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:07,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:07,284 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:07,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-16 14:11:07,485 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:07,485 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-16 14:11:07,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:07,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220824006] [2020-09-16 14:11:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:07,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220824006] [2020-09-16 14:11:07,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974216119] [2020-09-16 14:11:07,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:07,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:11:07,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:07,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:07,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:07,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:07,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:07,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-16 14:11:07,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121745852] [2020-09-16 14:11:07,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:07,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:07,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:07,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:07,952 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-16 14:11:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:08,951 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-16 14:11:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:11:08,952 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-16 14:11:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:08,953 INFO L225 Difference]: With dead ends: 124 [2020-09-16 14:11:08,953 INFO L226 Difference]: Without dead ends: 118 [2020-09-16 14:11:08,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-16 14:11:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-16 14:11:08,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-16 14:11:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-16 14:11:08,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-16 14:11:08,956 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-16 14:11:08,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:08,956 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-16 14:11:08,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-16 14:11:08,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:08,957 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:08,957 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:09,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-16 14:11:09,158 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:09,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:09,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-16 14:11:09,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:09,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506977731] [2020-09-16 14:11:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:09,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506977731] [2020-09-16 14:11:09,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494751925] [2020-09-16 14:11:09,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:09,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-16 14:11:09,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:09,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:09,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:09,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:09,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-16 14:11:09,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665197504] [2020-09-16 14:11:09,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:11:09,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:09,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:11:09,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:11:09,577 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-16 14:11:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:10,509 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-16 14:11:10,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-16 14:11:10,510 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-16 14:11:10,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:10,511 INFO L225 Difference]: With dead ends: 125 [2020-09-16 14:11:10,511 INFO L226 Difference]: Without dead ends: 119 [2020-09-16 14:11:10,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-16 14:11:10,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-16 14:11:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-16 14:11:10,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-16 14:11:10,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-16 14:11:10,514 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-16 14:11:10,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:10,514 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-16 14:11:10,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:11:10,514 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-16 14:11:10,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:10,514 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:10,515 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:10,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-16 14:11:10,715 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:10,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:10,716 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-16 14:11:10,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:10,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651562494] [2020-09-16 14:11:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:11,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651562494] [2020-09-16 14:11:11,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257213909] [2020-09-16 14:11:11,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:11,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-16 14:11:11,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:11,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:11,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:11,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:11,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:11,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-16 14:11:11,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458800677] [2020-09-16 14:11:11,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:11,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:11,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:11,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:11,180 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-16 14:11:12,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:12,274 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-16 14:11:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:11:12,275 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-16 14:11:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:12,276 INFO L225 Difference]: With dead ends: 122 [2020-09-16 14:11:12,276 INFO L226 Difference]: Without dead ends: 116 [2020-09-16 14:11:12,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-16 14:11:12,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-16 14:11:12,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-16 14:11:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-16 14:11:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-16 14:11:12,279 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-16 14:11:12,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:12,279 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-16 14:11:12,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-16 14:11:12,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:12,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:12,280 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:12,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-16 14:11:12,483 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:12,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:12,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-16 14:11:12,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:12,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756091562] [2020-09-16 14:11:12,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:12,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756091562] [2020-09-16 14:11:12,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583267449] [2020-09-16 14:11:12,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:12,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:12,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:12,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:12,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-16 14:11:12,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215607420] [2020-09-16 14:11:12,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:11:12,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:12,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:11:12,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:11:12,862 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-16 14:11:13,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:13,888 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-16 14:11:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-16 14:11:13,889 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-16 14:11:13,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:13,889 INFO L225 Difference]: With dead ends: 123 [2020-09-16 14:11:13,890 INFO L226 Difference]: Without dead ends: 117 [2020-09-16 14:11:13,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-16 14:11:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-16 14:11:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-16 14:11:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-16 14:11:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-16 14:11:13,895 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-16 14:11:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:13,895 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-16 14:11:13,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:11:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-16 14:11:13,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:13,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:13,895 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:14,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:14,096 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:14,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:14,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-16 14:11:14,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:14,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659327748] [2020-09-16 14:11:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:14,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659327748] [2020-09-16 14:11:14,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668111030] [2020-09-16 14:11:14,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:11:14,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:11:14,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:14,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:14,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:14,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:14,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-16 14:11:14,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837123967] [2020-09-16 14:11:14,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:14,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:14,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:14,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:14,540 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-16 14:11:15,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:15,757 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-16 14:11:15,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:11:15,758 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-16 14:11:15,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:15,759 INFO L225 Difference]: With dead ends: 120 [2020-09-16 14:11:15,759 INFO L226 Difference]: Without dead ends: 114 [2020-09-16 14:11:15,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-16 14:11:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-16 14:11:15,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-16 14:11:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-16 14:11:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-16 14:11:15,761 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-16 14:11:15,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:15,761 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-16 14:11:15,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:15,761 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-16 14:11:15,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:15,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:15,762 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:15,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:15,963 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:15,964 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-16 14:11:15,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:15,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842599968] [2020-09-16 14:11:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:16,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842599968] [2020-09-16 14:11:16,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39784066] [2020-09-16 14:11:16,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:16,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-16 14:11:16,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:16,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:16,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:16,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:16,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-16 14:11:16,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333657707] [2020-09-16 14:11:16,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:11:16,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:16,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:11:16,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:11:16,382 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-16 14:11:17,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:17,475 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-16 14:11:17,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-16 14:11:17,476 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-16 14:11:17,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:17,477 INFO L225 Difference]: With dead ends: 121 [2020-09-16 14:11:17,477 INFO L226 Difference]: Without dead ends: 115 [2020-09-16 14:11:17,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-16 14:11:17,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-16 14:11:17,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-16 14:11:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-16 14:11:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-16 14:11:17,480 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-16 14:11:17,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:17,480 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-16 14:11:17,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:11:17,481 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-16 14:11:17,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:17,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:17,481 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:17,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-16 14:11:17,683 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:17,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:17,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-16 14:11:17,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:17,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707214709] [2020-09-16 14:11:17,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:17,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707214709] [2020-09-16 14:11:17,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148556397] [2020-09-16 14:11:17,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:18,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:11:18,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:18,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:18,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:18,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:18,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:18,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-16 14:11:18,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400510704] [2020-09-16 14:11:18,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:18,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:18,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:18,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:18,100 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-16 14:11:19,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:19,402 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-16 14:11:19,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:11:19,403 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-16 14:11:19,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:19,404 INFO L225 Difference]: With dead ends: 118 [2020-09-16 14:11:19,404 INFO L226 Difference]: Without dead ends: 112 [2020-09-16 14:11:19,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-16 14:11:19,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-16 14:11:19,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-16 14:11:19,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-16 14:11:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-16 14:11:19,406 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-16 14:11:19,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:19,407 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-16 14:11:19,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:19,407 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-16 14:11:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:19,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:19,407 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:19,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:19,608 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:19,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-16 14:11:19,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:19,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995691487] [2020-09-16 14:11:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:19,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995691487] [2020-09-16 14:11:19,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143027934] [2020-09-16 14:11:19,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:19,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-16 14:11:19,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:19,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:19,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:20,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:20,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-16 14:11:20,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895714785] [2020-09-16 14:11:20,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:11:20,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:20,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:11:20,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:11:20,015 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-16 14:11:21,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:21,174 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-16 14:11:21,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-16 14:11:21,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-16 14:11:21,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:21,176 INFO L225 Difference]: With dead ends: 119 [2020-09-16 14:11:21,176 INFO L226 Difference]: Without dead ends: 113 [2020-09-16 14:11:21,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-16 14:11:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-16 14:11:21,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-16 14:11:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-16 14:11:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-16 14:11:21,180 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-16 14:11:21,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:21,180 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-16 14:11:21,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:11:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-16 14:11:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:21,180 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:21,181 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:21,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:21,390 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:21,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:21,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-16 14:11:21,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:21,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030928404] [2020-09-16 14:11:21,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:21,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030928404] [2020-09-16 14:11:21,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337868155] [2020-09-16 14:11:21,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:21,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-16 14:11:21,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:21,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:21,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:21,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:21,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:21,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-16 14:11:21,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267337916] [2020-09-16 14:11:21,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:21,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:21,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:21,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:21,832 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-16 14:11:23,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:23,282 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-16 14:11:23,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-16 14:11:23,283 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-16 14:11:23,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:23,284 INFO L225 Difference]: With dead ends: 116 [2020-09-16 14:11:23,284 INFO L226 Difference]: Without dead ends: 110 [2020-09-16 14:11:23,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-16 14:11:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-16 14:11:23,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-16 14:11:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-16 14:11:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-16 14:11:23,287 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-16 14:11:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:23,288 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-16 14:11:23,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:23,288 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-16 14:11:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:23,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:23,288 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:23,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:23,497 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:23,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:23,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-16 14:11:23,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:23,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771012743] [2020-09-16 14:11:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:23,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771012743] [2020-09-16 14:11:23,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417388095] [2020-09-16 14:11:23,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:23,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:23,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:23,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:23,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-16 14:11:23,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902926751] [2020-09-16 14:11:23,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-16 14:11:23,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:23,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-16 14:11:23,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:11:23,904 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-16 14:11:25,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:25,133 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-16 14:11:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-16 14:11:25,134 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-16 14:11:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:25,134 INFO L225 Difference]: With dead ends: 136 [2020-09-16 14:11:25,135 INFO L226 Difference]: Without dead ends: 130 [2020-09-16 14:11:25,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-16 14:11:25,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-16 14:11:25,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-16 14:11:25,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-16 14:11:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-16 14:11:25,138 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-16 14:11:25,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:25,138 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-16 14:11:25,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-16 14:11:25,139 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-16 14:11:25,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-16 14:11:25,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:25,139 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:25,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:25,349 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:25,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:25,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-16 14:11:25,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:25,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563714078] [2020-09-16 14:11:25,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:25,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563714078] [2020-09-16 14:11:25,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854767909] [2020-09-16 14:11:25,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:25,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:11:25,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:25,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-16 14:11:25,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:25,763 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:25,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:25,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-16 14:11:25,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220608222] [2020-09-16 14:11:25,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:25,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:25,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:25,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:25,784 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-16 14:11:27,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:27,248 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-16 14:11:27,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-16 14:11:27,249 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-16 14:11:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:27,250 INFO L225 Difference]: With dead ends: 117 [2020-09-16 14:11:27,250 INFO L226 Difference]: Without dead ends: 109 [2020-09-16 14:11:27,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-09-16 14:11:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-16 14:11:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-16 14:11:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-16 14:11:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-16 14:11:27,253 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-16 14:11:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:27,253 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-16 14:11:27,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:27,253 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-16 14:11:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:27,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:27,253 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:27,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:27,454 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:27,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:27,455 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-16 14:11:27,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:27,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281675518] [2020-09-16 14:11:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:27,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281675518] [2020-09-16 14:11:27,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685798067] [2020-09-16 14:11:27,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:27,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-16 14:11:27,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:27,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:27,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:27,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:27,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-16 14:11:27,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693614126] [2020-09-16 14:11:27,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:27,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:27,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:27,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:27,966 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-16 14:11:28,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:28,677 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-16 14:11:28,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:11:28,677 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-16 14:11:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:28,678 INFO L225 Difference]: With dead ends: 134 [2020-09-16 14:11:28,678 INFO L226 Difference]: Without dead ends: 128 [2020-09-16 14:11:28,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:11:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-16 14:11:28,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-16 14:11:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-16 14:11:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-16 14:11:28,681 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-16 14:11:28,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:28,681 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-16 14:11:28,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:28,682 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-16 14:11:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:28,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:28,682 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:28,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-16 14:11:28,883 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:28,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:28,883 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-16 14:11:28,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:28,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875011621] [2020-09-16 14:11:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:29,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875011621] [2020-09-16 14:11:29,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057807474] [2020-09-16 14:11:29,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:29,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:11:29,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:29,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:29,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:29,414 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:29,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:29,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-16 14:11:29,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060509223] [2020-09-16 14:11:29,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:11:29,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:11:29,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:11:29,430 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-16 14:11:30,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:30,268 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-16 14:11:30,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:11:30,269 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-16 14:11:30,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:30,270 INFO L225 Difference]: With dead ends: 131 [2020-09-16 14:11:30,270 INFO L226 Difference]: Without dead ends: 125 [2020-09-16 14:11:30,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:11:30,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-16 14:11:30,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-16 14:11:30,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-16 14:11:30,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-16 14:11:30,272 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-16 14:11:30,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:30,273 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-16 14:11:30,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:11:30,273 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-16 14:11:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:30,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:30,273 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:30,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-16 14:11:30,474 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:30,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:30,474 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-16 14:11:30,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:30,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742340223] [2020-09-16 14:11:30,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:30,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742340223] [2020-09-16 14:11:30,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398386938] [2020-09-16 14:11:30,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:30,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-16 14:11:30,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:30,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:30,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:30,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:30,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-16 14:11:30,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724168117] [2020-09-16 14:11:30,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:30,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:30,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:30,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:30,986 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-16 14:11:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:31,786 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-16 14:11:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-16 14:11:31,788 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-16 14:11:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:31,788 INFO L225 Difference]: With dead ends: 128 [2020-09-16 14:11:31,788 INFO L226 Difference]: Without dead ends: 122 [2020-09-16 14:11:31,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-16 14:11:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-16 14:11:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-16 14:11:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-16 14:11:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-16 14:11:31,791 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-16 14:11:31,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:31,791 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-16 14:11:31,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:31,792 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-16 14:11:31,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:31,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:31,792 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:31,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:31,993 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:31,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:31,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-16 14:11:31,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:31,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565171679] [2020-09-16 14:11:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:32,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565171679] [2020-09-16 14:11:32,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418818361] [2020-09-16 14:11:32,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:32,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-16 14:11:32,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:32,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:32,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:32,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:32,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-16 14:11:32,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999950914] [2020-09-16 14:11:32,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:11:32,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:32,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:11:32,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:11:32,523 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-16 14:11:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:33,475 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-16 14:11:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:11:33,476 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-16 14:11:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:33,476 INFO L225 Difference]: With dead ends: 127 [2020-09-16 14:11:33,476 INFO L226 Difference]: Without dead ends: 121 [2020-09-16 14:11:33,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-16 14:11:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-16 14:11:33,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-16 14:11:33,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-16 14:11:33,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-16 14:11:33,479 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-16 14:11:33,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:33,480 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-16 14:11:33,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:11:33,480 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-16 14:11:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:33,480 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:33,480 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:33,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-16 14:11:33,681 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:33,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:33,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-16 14:11:33,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:33,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429141889] [2020-09-16 14:11:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:34,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429141889] [2020-09-16 14:11:34,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975879713] [2020-09-16 14:11:34,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:34,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:34,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:34,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-16 14:11:34,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972328425] [2020-09-16 14:11:34,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:34,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:34,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:34,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:34,163 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-16 14:11:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:35,037 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-16 14:11:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 14:11:35,038 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-16 14:11:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:35,039 INFO L225 Difference]: With dead ends: 124 [2020-09-16 14:11:35,039 INFO L226 Difference]: Without dead ends: 118 [2020-09-16 14:11:35,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 14:11:35,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-16 14:11:35,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-16 14:11:35,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-16 14:11:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-16 14:11:35,042 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-16 14:11:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:35,042 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-16 14:11:35,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-16 14:11:35,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:35,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:35,043 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:35,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:35,244 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:35,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-16 14:11:35,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:35,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315740701] [2020-09-16 14:11:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:35,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315740701] [2020-09-16 14:11:35,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694714048] [2020-09-16 14:11:35,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:35,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:11:35,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:35,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:35,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:35,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:35,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:35,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-16 14:11:35,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598560286] [2020-09-16 14:11:35,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:11:35,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:35,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:11:35,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:11:35,753 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-16 14:11:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:36,785 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-16 14:11:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:11:36,786 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-16 14:11:36,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:36,786 INFO L225 Difference]: With dead ends: 123 [2020-09-16 14:11:36,786 INFO L226 Difference]: Without dead ends: 117 [2020-09-16 14:11:36,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-16 14:11:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-16 14:11:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-16 14:11:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-16 14:11:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-16 14:11:36,789 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-16 14:11:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:36,789 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-16 14:11:36,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:11:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-16 14:11:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:36,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:36,790 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:36,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:36,991 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:36,991 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-16 14:11:36,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:36,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637397042] [2020-09-16 14:11:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:37,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637397042] [2020-09-16 14:11:37,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387402781] [2020-09-16 14:11:37,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:37,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-16 14:11:37,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:37,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:37,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:37,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:37,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-16 14:11:37,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613032045] [2020-09-16 14:11:37,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:37,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:37,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:37,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:37,470 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-16 14:11:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:38,426 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-16 14:11:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:11:38,427 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-16 14:11:38,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:38,428 INFO L225 Difference]: With dead ends: 120 [2020-09-16 14:11:38,428 INFO L226 Difference]: Without dead ends: 114 [2020-09-16 14:11:38,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-16 14:11:38,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-16 14:11:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-16 14:11:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-16 14:11:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-16 14:11:38,430 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-16 14:11:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:38,431 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-16 14:11:38,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-16 14:11:38,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:38,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:38,431 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:38,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:38,632 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:38,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:38,632 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-16 14:11:38,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:38,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270034635] [2020-09-16 14:11:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:39,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270034635] [2020-09-16 14:11:39,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95682826] [2020-09-16 14:11:39,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:39,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:11:39,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:39,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:39,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:39,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:39,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:39,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-16 14:11:39,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172911463] [2020-09-16 14:11:39,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:11:39,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:39,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:11:39,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:11:39,123 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-16 14:11:40,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:40,318 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-16 14:11:40,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:11:40,319 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-16 14:11:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:40,320 INFO L225 Difference]: With dead ends: 119 [2020-09-16 14:11:40,320 INFO L226 Difference]: Without dead ends: 113 [2020-09-16 14:11:40,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-16 14:11:40,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-16 14:11:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-16 14:11:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-16 14:11:40,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-16 14:11:40,323 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-16 14:11:40,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:40,323 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-16 14:11:40,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:11:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-16 14:11:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:40,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:40,324 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:40,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:40,525 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:40,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:40,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-16 14:11:40,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:40,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967434757] [2020-09-16 14:11:40,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:40,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967434757] [2020-09-16 14:11:40,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367517267] [2020-09-16 14:11:40,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:40,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-16 14:11:40,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:40,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:40,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:40,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:40,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-16 14:11:40,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702462078] [2020-09-16 14:11:40,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:40,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:40,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:40,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:40,986 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-16 14:11:42,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:42,022 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-16 14:11:42,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-16 14:11:42,024 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-16 14:11:42,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:42,024 INFO L225 Difference]: With dead ends: 116 [2020-09-16 14:11:42,024 INFO L226 Difference]: Without dead ends: 110 [2020-09-16 14:11:42,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-16 14:11:42,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-16 14:11:42,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-16 14:11:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-16 14:11:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-16 14:11:42,027 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-16 14:11:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:42,028 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-16 14:11:42,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-16 14:11:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:42,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:42,028 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:42,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-16 14:11:42,229 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:42,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:42,230 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-16 14:11:42,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:42,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643010721] [2020-09-16 14:11:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:42,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643010721] [2020-09-16 14:11:42,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156002006] [2020-09-16 14:11:42,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:42,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-16 14:11:42,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:42,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:42,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:42,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:42,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:42,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-16 14:11:42,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357136561] [2020-09-16 14:11:42,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:11:42,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:42,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:11:42,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:11:42,730 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-16 14:11:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:44,066 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-16 14:11:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:11:44,067 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-16 14:11:44,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:44,068 INFO L225 Difference]: With dead ends: 115 [2020-09-16 14:11:44,068 INFO L226 Difference]: Without dead ends: 109 [2020-09-16 14:11:44,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-16 14:11:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-16 14:11:44,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-16 14:11:44,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-16 14:11:44,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-16 14:11:44,071 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-16 14:11:44,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:44,072 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-16 14:11:44,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:11:44,072 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-16 14:11:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:44,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:44,073 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:44,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:44,283 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:44,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-16 14:11:44,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:44,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070467905] [2020-09-16 14:11:44,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:44,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070467905] [2020-09-16 14:11:44,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843391148] [2020-09-16 14:11:44,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:44,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:44,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:44,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:44,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-16 14:11:44,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975882574] [2020-09-16 14:11:44,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:44,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:44,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:44,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:44,721 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-16 14:11:45,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:45,880 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-16 14:11:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-16 14:11:45,886 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-16 14:11:45,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:45,886 INFO L225 Difference]: With dead ends: 112 [2020-09-16 14:11:45,886 INFO L226 Difference]: Without dead ends: 106 [2020-09-16 14:11:45,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-16 14:11:45,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-16 14:11:45,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-16 14:11:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-16 14:11:45,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-16 14:11:45,889 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-16 14:11:45,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:45,889 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-16 14:11:45,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:45,889 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-16 14:11:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:45,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:45,890 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:46,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-16 14:11:46,092 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:46,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:46,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-16 14:11:46,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:46,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525035405] [2020-09-16 14:11:46,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:46,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525035405] [2020-09-16 14:11:46,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130543710] [2020-09-16 14:11:46,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:46,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:11:46,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:46,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:46,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:46,548 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:46,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:46,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-16 14:11:46,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080566599] [2020-09-16 14:11:46,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:11:46,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:46,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:11:46,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:11:46,575 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-16 14:11:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:48,043 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-16 14:11:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:11:48,044 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-16 14:11:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:48,044 INFO L225 Difference]: With dead ends: 111 [2020-09-16 14:11:48,044 INFO L226 Difference]: Without dead ends: 105 [2020-09-16 14:11:48,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-16 14:11:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-16 14:11:48,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-16 14:11:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-16 14:11:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-16 14:11:48,046 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-16 14:11:48,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:48,046 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-16 14:11:48,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:11:48,046 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-16 14:11:48,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:48,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:48,047 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:48,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-16 14:11:48,248 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:48,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:48,248 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-16 14:11:48,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:48,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379818698] [2020-09-16 14:11:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:48,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379818698] [2020-09-16 14:11:48,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347095974] [2020-09-16 14:11:48,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:48,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-16 14:11:48,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:48,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:48,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:48,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:48,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-16 14:11:48,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807062238] [2020-09-16 14:11:48,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:48,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:48,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:48,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:48,703 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-16 14:11:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:49,921 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-16 14:11:49,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-16 14:11:49,922 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-16 14:11:49,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:49,922 INFO L225 Difference]: With dead ends: 108 [2020-09-16 14:11:49,922 INFO L226 Difference]: Without dead ends: 102 [2020-09-16 14:11:49,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-16 14:11:49,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-16 14:11:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-16 14:11:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-16 14:11:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-16 14:11:49,925 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-16 14:11:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:49,926 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-16 14:11:49,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-16 14:11:49,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:49,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:49,926 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:50,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:50,132 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:50,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:50,132 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-16 14:11:50,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:50,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038033959] [2020-09-16 14:11:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:50,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038033959] [2020-09-16 14:11:50,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117442736] [2020-09-16 14:11:50,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:11:50,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:11:50,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:50,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:50,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:50,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:50,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:50,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-16 14:11:50,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668867585] [2020-09-16 14:11:50,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:11:50,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:50,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:11:50,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:11:50,609 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-16 14:11:52,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:52,188 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-16 14:11:52,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-16 14:11:52,189 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-16 14:11:52,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:52,190 INFO L225 Difference]: With dead ends: 107 [2020-09-16 14:11:52,190 INFO L226 Difference]: Without dead ends: 101 [2020-09-16 14:11:52,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-16 14:11:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-16 14:11:52,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-16 14:11:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-16 14:11:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-16 14:11:52,194 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-16 14:11:52,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:52,194 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-16 14:11:52,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:11:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-16 14:11:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:52,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:52,195 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:52,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:52,399 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:52,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-16 14:11:52,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:52,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985653284] [2020-09-16 14:11:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:52,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985653284] [2020-09-16 14:11:52,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577945378] [2020-09-16 14:11:52,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:52,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-16 14:11:52,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:52,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:52,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:52,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:52,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-16 14:11:52,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76743186] [2020-09-16 14:11:52,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:52,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:52,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:52,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:52,844 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-16 14:11:54,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:54,161 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-16 14:11:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-16 14:11:54,162 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-16 14:11:54,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:54,163 INFO L225 Difference]: With dead ends: 104 [2020-09-16 14:11:54,163 INFO L226 Difference]: Without dead ends: 98 [2020-09-16 14:11:54,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-16 14:11:54,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-16 14:11:54,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-16 14:11:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-16 14:11:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-16 14:11:54,166 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-16 14:11:54,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:54,166 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-16 14:11:54,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:54,166 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-16 14:11:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:54,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:54,166 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:54,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:54,367 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:54,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:54,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-16 14:11:54,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:54,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32082998] [2020-09-16 14:11:54,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:54,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32082998] [2020-09-16 14:11:54,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360274006] [2020-09-16 14:11:54,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:54,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-16 14:11:54,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:54,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:54,827 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:54,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:54,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-16 14:11:54,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576437845] [2020-09-16 14:11:54,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:11:54,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:54,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:11:54,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:11:54,850 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-16 14:11:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:56,581 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-16 14:11:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-16 14:11:56,582 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-16 14:11:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:56,583 INFO L225 Difference]: With dead ends: 103 [2020-09-16 14:11:56,583 INFO L226 Difference]: Without dead ends: 97 [2020-09-16 14:11:56,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-16 14:11:56,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-16 14:11:56,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-16 14:11:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-16 14:11:56,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-16 14:11:56,586 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-16 14:11:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:56,587 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-16 14:11:56,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:11:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-16 14:11:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:56,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:56,587 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:56,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-16 14:11:56,796 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:56,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:56,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-16 14:11:56,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:56,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166209217] [2020-09-16 14:11:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:57,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166209217] [2020-09-16 14:11:57,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722763808] [2020-09-16 14:11:57,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:57,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:57,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:57,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:57,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-16 14:11:57,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029162373] [2020-09-16 14:11:57,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-16 14:11:57,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:57,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-16 14:11:57,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:11:57,247 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-16 14:11:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:11:58,636 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-16 14:11:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-16 14:11:58,638 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-16 14:11:58,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:11:58,638 INFO L225 Difference]: With dead ends: 119 [2020-09-16 14:11:58,638 INFO L226 Difference]: Without dead ends: 113 [2020-09-16 14:11:58,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-16 14:11:58,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-16 14:11:58,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-16 14:11:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-16 14:11:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-16 14:11:58,642 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-16 14:11:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:11:58,642 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-16 14:11:58,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-16 14:11:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-16 14:11:58,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:11:58,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:11:58,643 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:11:58,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:58,844 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:11:58,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:11:58,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-16 14:11:58,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:11:58,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411789704] [2020-09-16 14:11:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:11:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:11:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:59,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411789704] [2020-09-16 14:11:59,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795872962] [2020-09-16 14:11:59,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:11:59,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:11:59,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:11:59,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:11:59,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:11:59,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:11:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:11:59,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:11:59,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-16 14:11:59,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116891631] [2020-09-16 14:11:59,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:11:59,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:11:59,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:11:59,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:11:59,318 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-16 14:12:01,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:01,061 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-09-16 14:12:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-16 14:12:01,063 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-16 14:12:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:01,063 INFO L225 Difference]: With dead ends: 100 [2020-09-16 14:12:01,063 INFO L226 Difference]: Without dead ends: 92 [2020-09-16 14:12:01,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-09-16 14:12:01,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-16 14:12:01,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-09-16 14:12:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-16 14:12:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-16 14:12:01,067 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-16 14:12:01,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:01,067 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-16 14:12:01,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:12:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-16 14:12:01,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-16 14:12:01,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:01,068 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:01,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:01,270 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:01,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:01,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-16 14:12:01,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:01,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236473740] [2020-09-16 14:12:01,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:01,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236473740] [2020-09-16 14:12:01,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460691667] [2020-09-16 14:12:01,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:01,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-16 14:12:01,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:01,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-16 14:12:01,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:01,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:12:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:01,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:01,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-16 14:12:01,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560828680] [2020-09-16 14:12:01,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:12:01,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:01,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:12:01,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:12:01,753 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-16 14:12:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:03,405 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-16 14:12:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-16 14:12:03,406 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-16 14:12:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:03,407 INFO L225 Difference]: With dead ends: 116 [2020-09-16 14:12:03,407 INFO L226 Difference]: Without dead ends: 111 [2020-09-16 14:12:03,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-16 14:12:03,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-16 14:12:03,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-16 14:12:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-16 14:12:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-16 14:12:03,410 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-16 14:12:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:03,410 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-16 14:12:03,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:12:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-16 14:12:03,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:03,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:03,411 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:03,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:03,611 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:03,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:03,612 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-16 14:12:03,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:03,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979037182] [2020-09-16 14:12:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:03,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979037182] [2020-09-16 14:12:03,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120312179] [2020-09-16 14:12:03,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:04,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:12:04,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:04,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:04,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:04,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:12:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:04,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:04,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-16 14:12:04,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671334919] [2020-09-16 14:12:04,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:04,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:04,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:04,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:04,120 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-16 14:12:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:05,876 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-16 14:12:05,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-16 14:12:05,878 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-16 14:12:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:05,878 INFO L225 Difference]: With dead ends: 96 [2020-09-16 14:12:05,878 INFO L226 Difference]: Without dead ends: 91 [2020-09-16 14:12:05,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-16 14:12:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-16 14:12:05,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-16 14:12:05,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-16 14:12:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-16 14:12:05,881 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-16 14:12:05,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:05,881 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-16 14:12:05,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:12:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-16 14:12:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:05,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:05,882 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:06,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:06,083 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:06,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:06,083 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-16 14:12:06,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:06,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573868389] [2020-09-16 14:12:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:06,578 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:06,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573868389] [2020-09-16 14:12:06,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943935046] [2020-09-16 14:12:06,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:06,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-16 14:12:06,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:06,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:06,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:06,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:06,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-16 14:12:06,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198446972] [2020-09-16 14:12:06,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:12:06,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:06,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:12:06,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:12:06,662 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-16 14:12:07,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:07,386 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-16 14:12:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:12:07,387 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-16 14:12:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:07,387 INFO L225 Difference]: With dead ends: 102 [2020-09-16 14:12:07,387 INFO L226 Difference]: Without dead ends: 96 [2020-09-16 14:12:07,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-16 14:12:07,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-16 14:12:07,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-16 14:12:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-16 14:12:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-16 14:12:07,390 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-16 14:12:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:07,390 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-16 14:12:07,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:12:07,391 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-16 14:12:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:07,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:07,391 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:07,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-16 14:12:07,592 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:07,592 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-16 14:12:07,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:07,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179144127] [2020-09-16 14:12:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:08,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179144127] [2020-09-16 14:12:08,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779675775] [2020-09-16 14:12:08,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:08,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-16 14:12:08,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:08,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:08,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:08,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:12:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:08,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:08,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-16 14:12:08,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355001201] [2020-09-16 14:12:08,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:08,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:08,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:08,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:08,211 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-16 14:12:09,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:09,045 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-16 14:12:09,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:12:09,046 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-16 14:12:09,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:09,046 INFO L225 Difference]: With dead ends: 122 [2020-09-16 14:12:09,046 INFO L226 Difference]: Without dead ends: 116 [2020-09-16 14:12:09,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:12:09,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-16 14:12:09,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-16 14:12:09,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-16 14:12:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-16 14:12:09,049 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-16 14:12:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:09,049 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-16 14:12:09,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:12:09,050 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-16 14:12:09,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:09,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:09,050 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:09,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-16 14:12:09,251 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:09,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:09,251 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-16 14:12:09,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:09,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252293771] [2020-09-16 14:12:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:09,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252293771] [2020-09-16 14:12:09,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502371302] [2020-09-16 14:12:09,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:09,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:09,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:09,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:09,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-16 14:12:09,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024946797] [2020-09-16 14:12:09,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:12:09,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:09,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:12:09,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:12:09,807 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-09-16 14:12:10,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:10,669 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-09-16 14:12:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 14:12:10,670 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-16 14:12:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:10,671 INFO L225 Difference]: With dead ends: 123 [2020-09-16 14:12:10,671 INFO L226 Difference]: Without dead ends: 117 [2020-09-16 14:12:10,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 14:12:10,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-16 14:12:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-09-16 14:12:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-16 14:12:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-09-16 14:12:10,674 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-09-16 14:12:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:10,674 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-09-16 14:12:10,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:12:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-09-16 14:12:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:10,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:10,674 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:10,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-16 14:12:10,875 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:10,876 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-09-16 14:12:10,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:10,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756206475] [2020-09-16 14:12:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:11,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756206475] [2020-09-16 14:12:11,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953637105] [2020-09-16 14:12:11,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:11,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:12:11,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:11,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:11,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:11,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:12:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:11,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:11,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-16 14:12:11,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789131048] [2020-09-16 14:12:11,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:11,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:11,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:11,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:11,480 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-09-16 14:12:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:12,415 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-09-16 14:12:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:12:12,416 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-16 14:12:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:12,417 INFO L225 Difference]: With dead ends: 139 [2020-09-16 14:12:12,417 INFO L226 Difference]: Without dead ends: 133 [2020-09-16 14:12:12,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-09-16 14:12:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-16 14:12:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-09-16 14:12:12,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-16 14:12:12,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-09-16 14:12:12,420 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-09-16 14:12:12,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:12,420 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-09-16 14:12:12,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:12:12,420 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-09-16 14:12:12,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:12,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:12,420 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:12,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-16 14:12:12,627 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:12,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-09-16 14:12:12,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:12,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926850097] [2020-09-16 14:12:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:13,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926850097] [2020-09-16 14:12:13,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399967715] [2020-09-16 14:12:13,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:13,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-16 14:12:13,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:13,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:13,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:13,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:13,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-16 14:12:13,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659775701] [2020-09-16 14:12:13,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:12:13,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:13,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:12:13,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:12:13,180 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-09-16 14:12:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:14,170 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-09-16 14:12:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:12:14,171 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-16 14:12:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:14,172 INFO L225 Difference]: With dead ends: 139 [2020-09-16 14:12:14,172 INFO L226 Difference]: Without dead ends: 133 [2020-09-16 14:12:14,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-09-16 14:12:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-16 14:12:14,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-09-16 14:12:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-16 14:12:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-09-16 14:12:14,175 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-09-16 14:12:14,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:14,175 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-09-16 14:12:14,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:12:14,176 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-09-16 14:12:14,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:14,176 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:14,176 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:14,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:14,380 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:14,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:14,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-09-16 14:12:14,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:14,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454982338] [2020-09-16 14:12:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:14,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454982338] [2020-09-16 14:12:14,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863304461] [2020-09-16 14:12:14,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:14,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:12:14,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:14,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:14,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:14,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:12:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:14,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:14,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-16 14:12:14,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022093049] [2020-09-16 14:12:14,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:14,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:14,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:14,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:14,955 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-09-16 14:12:16,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:16,042 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-09-16 14:12:16,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:12:16,043 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-16 14:12:16,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:16,044 INFO L225 Difference]: With dead ends: 136 [2020-09-16 14:12:16,044 INFO L226 Difference]: Without dead ends: 130 [2020-09-16 14:12:16,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-09-16 14:12:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-16 14:12:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-09-16 14:12:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-16 14:12:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-09-16 14:12:16,047 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-09-16 14:12:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:16,047 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-09-16 14:12:16,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:12:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-09-16 14:12:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:16,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:16,048 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:16,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-16 14:12:16,249 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:16,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:16,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-09-16 14:12:16,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:16,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054183296] [2020-09-16 14:12:16,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:16,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054183296] [2020-09-16 14:12:16,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144401515] [2020-09-16 14:12:16,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:16,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-16 14:12:16,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:16,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:16,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:16,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:16,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-16 14:12:16,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547942321] [2020-09-16 14:12:16,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:12:16,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:16,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:12:16,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:12:16,776 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-09-16 14:12:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:17,840 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-09-16 14:12:17,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-16 14:12:17,841 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-16 14:12:17,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:17,842 INFO L225 Difference]: With dead ends: 137 [2020-09-16 14:12:17,842 INFO L226 Difference]: Without dead ends: 131 [2020-09-16 14:12:17,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-09-16 14:12:17,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-16 14:12:17,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-09-16 14:12:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-16 14:12:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-09-16 14:12:17,845 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-09-16 14:12:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:17,846 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-09-16 14:12:17,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:12:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-09-16 14:12:17,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:17,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:17,846 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:18,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:18,047 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:18,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:18,047 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-09-16 14:12:18,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:18,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468191273] [2020-09-16 14:12:18,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:18,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468191273] [2020-09-16 14:12:18,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783238374] [2020-09-16 14:12:18,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:18,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-16 14:12:18,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:18,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:18,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:18,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:12:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:18,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:18,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-16 14:12:18,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992432307] [2020-09-16 14:12:18,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:18,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:18,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:18,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:18,629 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-09-16 14:12:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:19,841 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-09-16 14:12:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:12:19,842 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-16 14:12:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:19,842 INFO L225 Difference]: With dead ends: 134 [2020-09-16 14:12:19,842 INFO L226 Difference]: Without dead ends: 128 [2020-09-16 14:12:19,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-09-16 14:12:19,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-16 14:12:19,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-09-16 14:12:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-16 14:12:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-09-16 14:12:19,849 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-09-16 14:12:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:19,849 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-09-16 14:12:19,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:12:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-09-16 14:12:19,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:19,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:19,850 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:20,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-16 14:12:20,050 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:20,051 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-09-16 14:12:20,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:20,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506884251] [2020-09-16 14:12:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:20,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506884251] [2020-09-16 14:12:20,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143463324] [2020-09-16 14:12:20,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:12:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:20,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:20,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:20,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:20,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-16 14:12:20,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841624009] [2020-09-16 14:12:20,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:12:20,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:20,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:12:20,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:12:20,565 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-09-16 14:12:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:21,712 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-09-16 14:12:21,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-16 14:12:21,713 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-16 14:12:21,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:21,713 INFO L225 Difference]: With dead ends: 135 [2020-09-16 14:12:21,713 INFO L226 Difference]: Without dead ends: 129 [2020-09-16 14:12:21,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-09-16 14:12:21,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-16 14:12:21,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-09-16 14:12:21,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-16 14:12:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-09-16 14:12:21,716 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-09-16 14:12:21,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:21,716 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-09-16 14:12:21,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:12:21,717 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-09-16 14:12:21,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:21,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:21,717 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:21,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:21,918 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:21,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:21,918 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-09-16 14:12:21,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:21,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256771891] [2020-09-16 14:12:21,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:22,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256771891] [2020-09-16 14:12:22,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746879638] [2020-09-16 14:12:22,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:22,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:12:22,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:22,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:22,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:22,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:12:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:22,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:22,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-16 14:12:22,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958679083] [2020-09-16 14:12:22,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:22,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:22,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:22,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:22,467 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-09-16 14:12:23,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:23,816 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-09-16 14:12:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:12:23,817 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-16 14:12:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:23,818 INFO L225 Difference]: With dead ends: 132 [2020-09-16 14:12:23,818 INFO L226 Difference]: Without dead ends: 126 [2020-09-16 14:12:23,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-09-16 14:12:23,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-16 14:12:23,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-09-16 14:12:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-16 14:12:23,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-09-16 14:12:23,821 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-09-16 14:12:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:23,821 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-09-16 14:12:23,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:12:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-09-16 14:12:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:23,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:23,821 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:24,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:24,022 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:24,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:24,023 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-09-16 14:12:24,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:24,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27868351] [2020-09-16 14:12:24,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:24,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27868351] [2020-09-16 14:12:24,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002579155] [2020-09-16 14:12:24,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:24,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-16 14:12:24,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:24,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:24,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:24,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:24,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-16 14:12:24,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768090305] [2020-09-16 14:12:24,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:12:24,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:24,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:12:24,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:12:24,518 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-09-16 14:12:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:25,751 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-09-16 14:12:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-16 14:12:25,752 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-16 14:12:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:25,753 INFO L225 Difference]: With dead ends: 133 [2020-09-16 14:12:25,753 INFO L226 Difference]: Without dead ends: 127 [2020-09-16 14:12:25,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-09-16 14:12:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-16 14:12:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-09-16 14:12:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-16 14:12:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-09-16 14:12:25,756 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-09-16 14:12:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:25,756 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-09-16 14:12:25,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:12:25,756 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-09-16 14:12:25,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:25,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:25,757 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:25,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:25,957 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:25,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:25,958 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-09-16 14:12:25,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:25,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539962824] [2020-09-16 14:12:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:26,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539962824] [2020-09-16 14:12:26,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173903926] [2020-09-16 14:12:26,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:26,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:12:26,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:26,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:26,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:26,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:12:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:26,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:26,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-16 14:12:26,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834326608] [2020-09-16 14:12:26,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:26,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:26,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:26,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:26,490 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-09-16 14:12:27,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:27,951 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-09-16 14:12:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:12:27,952 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-16 14:12:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:27,952 INFO L225 Difference]: With dead ends: 130 [2020-09-16 14:12:27,953 INFO L226 Difference]: Without dead ends: 124 [2020-09-16 14:12:27,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-09-16 14:12:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-16 14:12:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-09-16 14:12:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-16 14:12:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-09-16 14:12:27,962 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-09-16 14:12:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:27,962 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-09-16 14:12:27,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:12:27,962 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-09-16 14:12:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:27,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:27,963 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:28,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:28,170 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:28,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-09-16 14:12:28,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:28,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535332766] [2020-09-16 14:12:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:28,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535332766] [2020-09-16 14:12:28,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524425352] [2020-09-16 14:12:28,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:28,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-16 14:12:28,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:28,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:28,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:28,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:28,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-16 14:12:28,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294959873] [2020-09-16 14:12:28,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:12:28,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:28,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:12:28,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:12:28,666 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-09-16 14:12:29,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:29,978 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-09-16 14:12:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-16 14:12:29,979 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-16 14:12:29,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:29,980 INFO L225 Difference]: With dead ends: 131 [2020-09-16 14:12:29,980 INFO L226 Difference]: Without dead ends: 125 [2020-09-16 14:12:29,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-09-16 14:12:29,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-16 14:12:29,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-09-16 14:12:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-16 14:12:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-09-16 14:12:29,983 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-09-16 14:12:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:29,983 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-09-16 14:12:29,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:12:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-09-16 14:12:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:29,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:29,983 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:30,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-16 14:12:30,184 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:30,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-09-16 14:12:30,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:30,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737914845] [2020-09-16 14:12:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:30,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737914845] [2020-09-16 14:12:30,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233507979] [2020-09-16 14:12:30,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:30,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-16 14:12:30,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:30,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:30,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:30,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:12:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:30,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:30,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-16 14:12:30,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945841644] [2020-09-16 14:12:30,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:30,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:30,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:30,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:30,709 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-09-16 14:12:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:32,296 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-09-16 14:12:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-16 14:12:32,297 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-16 14:12:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:32,297 INFO L225 Difference]: With dead ends: 128 [2020-09-16 14:12:32,297 INFO L226 Difference]: Without dead ends: 122 [2020-09-16 14:12:32,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-09-16 14:12:32,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-16 14:12:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-09-16 14:12:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-16 14:12:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-09-16 14:12:32,300 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-09-16 14:12:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:32,300 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-09-16 14:12:32,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:12:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-09-16 14:12:32,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:32,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:32,301 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:32,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-16 14:12:32,502 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:32,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:32,502 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-09-16 14:12:32,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:32,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205066122] [2020-09-16 14:12:32,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:32,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205066122] [2020-09-16 14:12:32,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976062172] [2020-09-16 14:12:32,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:32,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:32,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:32,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:32,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-16 14:12:32,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013442188] [2020-09-16 14:12:32,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:12:32,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:32,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:12:32,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:12:32,983 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-09-16 14:12:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:34,412 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-09-16 14:12:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-16 14:12:34,413 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-16 14:12:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:34,414 INFO L225 Difference]: With dead ends: 129 [2020-09-16 14:12:34,414 INFO L226 Difference]: Without dead ends: 123 [2020-09-16 14:12:34,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-09-16 14:12:34,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-16 14:12:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-09-16 14:12:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-16 14:12:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-16 14:12:34,417 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-09-16 14:12:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:34,417 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-16 14:12:34,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:12:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-16 14:12:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:34,417 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:34,417 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:34,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-16 14:12:34,618 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:34,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:34,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-09-16 14:12:34,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:34,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224762048] [2020-09-16 14:12:34,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:35,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224762048] [2020-09-16 14:12:35,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543351560] [2020-09-16 14:12:35,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:35,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:12:35,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:35,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:35,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:35,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:12:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:35,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:35,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-16 14:12:35,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446122589] [2020-09-16 14:12:35,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:35,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:35,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:35,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:35,135 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-09-16 14:12:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:36,875 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-09-16 14:12:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-16 14:12:36,876 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-16 14:12:36,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:36,877 INFO L225 Difference]: With dead ends: 126 [2020-09-16 14:12:36,877 INFO L226 Difference]: Without dead ends: 120 [2020-09-16 14:12:36,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-09-16 14:12:36,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-16 14:12:36,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-09-16 14:12:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-16 14:12:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-16 14:12:36,880 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-09-16 14:12:36,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:36,880 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-16 14:12:36,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:12:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-16 14:12:36,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:36,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:36,881 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:37,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-16 14:12:37,081 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:37,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:37,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-09-16 14:12:37,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:37,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842801938] [2020-09-16 14:12:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:37,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842801938] [2020-09-16 14:12:37,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844561936] [2020-09-16 14:12:37,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:37,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-16 14:12:37,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:37,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:37,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:37,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:37,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-16 14:12:37,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179272279] [2020-09-16 14:12:37,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:12:37,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:37,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:12:37,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:12:37,600 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-09-16 14:12:39,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:39,107 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-09-16 14:12:39,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-16 14:12:39,108 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-16 14:12:39,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:39,109 INFO L225 Difference]: With dead ends: 127 [2020-09-16 14:12:39,109 INFO L226 Difference]: Without dead ends: 121 [2020-09-16 14:12:39,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-09-16 14:12:39,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-16 14:12:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-09-16 14:12:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-16 14:12:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-09-16 14:12:39,111 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-09-16 14:12:39,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:39,111 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-09-16 14:12:39,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:12:39,111 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-09-16 14:12:39,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:39,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:39,112 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:39,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:39,312 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:39,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:39,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-09-16 14:12:39,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:39,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571525645] [2020-09-16 14:12:39,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:39,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571525645] [2020-09-16 14:12:39,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807586582] [2020-09-16 14:12:39,710 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 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 [2020-09-16 14:12:39,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:12:39,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:39,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:39,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:39,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:12:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:39,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:39,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-16 14:12:39,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101721817] [2020-09-16 14:12:39,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:39,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:39,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:39,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:39,833 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-09-16 14:12:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:41,700 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-09-16 14:12:41,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-16 14:12:41,701 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-16 14:12:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:41,701 INFO L225 Difference]: With dead ends: 124 [2020-09-16 14:12:41,701 INFO L226 Difference]: Without dead ends: 118 [2020-09-16 14:12:41,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-09-16 14:12:41,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-16 14:12:41,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-09-16 14:12:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-16 14:12:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-16 14:12:41,704 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-09-16 14:12:41,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:41,705 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-16 14:12:41,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:12:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-16 14:12:41,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:41,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:41,705 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:41,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-16 14:12:41,906 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:41,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:41,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-09-16 14:12:41,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:41,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454536015] [2020-09-16 14:12:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:41,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:42,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454536015] [2020-09-16 14:12:42,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514193094] [2020-09-16 14:12:42,294 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 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 [2020-09-16 14:12:42,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-16 14:12:42,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:42,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:42,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:42,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:42,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-16 14:12:42,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156922001] [2020-09-16 14:12:42,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-16 14:12:42,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:42,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-16 14:12:42,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:12:42,396 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-09-16 14:12:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:43,998 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-09-16 14:12:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-16 14:12:43,999 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-16 14:12:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:43,999 INFO L225 Difference]: With dead ends: 144 [2020-09-16 14:12:44,000 INFO L226 Difference]: Without dead ends: 138 [2020-09-16 14:12:44,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-09-16 14:12:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-16 14:12:44,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-09-16 14:12:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-16 14:12:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-09-16 14:12:44,002 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-09-16 14:12:44,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:44,003 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-09-16 14:12:44,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-16 14:12:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-09-16 14:12:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 14:12:44,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:44,003 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:44,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:44,206 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:44,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:44,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-09-16 14:12:44,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:44,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142486965] [2020-09-16 14:12:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:44,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142486965] [2020-09-16 14:12:44,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381006319] [2020-09-16 14:12:44,592 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 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 [2020-09-16 14:12:44,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-16 14:12:44,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:44,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-16 14:12:44,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:44,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:12:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:44,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:44,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-16 14:12:44,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749993515] [2020-09-16 14:12:44,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:44,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:44,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:44,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:44,722 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-09-16 14:12:46,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:46,655 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-09-16 14:12:46,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-16 14:12:46,657 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-16 14:12:46,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:46,657 INFO L225 Difference]: With dead ends: 125 [2020-09-16 14:12:46,657 INFO L226 Difference]: Without dead ends: 117 [2020-09-16 14:12:46,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-09-16 14:12:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-16 14:12:46,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-09-16 14:12:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-16 14:12:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-09-16 14:12:46,660 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-09-16 14:12:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:46,661 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-09-16 14:12:46,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:12:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-09-16 14:12:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:12:46,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:46,661 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:46,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-16 14:12:46,862 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:46,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-09-16 14:12:46,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:46,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501332976] [2020-09-16 14:12:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:47,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501332976] [2020-09-16 14:12:47,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400819970] [2020-09-16 14:12:47,402 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:47,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:12:47,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:47,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:47,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-16 14:12:47,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445933383] [2020-09-16 14:12:47,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:47,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:47,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:47,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:47,484 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-09-16 14:12:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:48,358 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-09-16 14:12:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-16 14:12:48,360 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-16 14:12:48,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:48,360 INFO L225 Difference]: With dead ends: 144 [2020-09-16 14:12:48,360 INFO L226 Difference]: Without dead ends: 138 [2020-09-16 14:12:48,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 14:12:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-16 14:12:48,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-09-16 14:12:48,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-16 14:12:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-16 14:12:48,364 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-16 14:12:48,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:48,365 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-16 14:12:48,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:12:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-16 14:12:48,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:12:48,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:48,365 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:48,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:48,570 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:48,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:48,571 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-09-16 14:12:48,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:48,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529465054] [2020-09-16 14:12:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:49,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529465054] [2020-09-16 14:12:49,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142292589] [2020-09-16 14:12:49,139 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:49,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:12:49,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:49,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:12:49,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:49,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:12:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:49,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:49,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-16 14:12:49,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902003257] [2020-09-16 14:12:49,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-16 14:12:49,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:49,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-16 14:12:49,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:12:49,258 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-16 14:12:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:50,231 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-09-16 14:12:50,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:12:50,232 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-16 14:12:50,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:50,233 INFO L225 Difference]: With dead ends: 141 [2020-09-16 14:12:50,233 INFO L226 Difference]: Without dead ends: 135 [2020-09-16 14:12:50,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-09-16 14:12:50,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-16 14:12:50,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-09-16 14:12:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-16 14:12:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-16 14:12:50,236 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-16 14:12:50,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:50,236 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-16 14:12:50,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-16 14:12:50,236 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-16 14:12:50,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:12:50,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:50,236 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:50,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-09-16 14:12:50,437 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:50,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:50,438 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-09-16 14:12:50,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:50,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624880356] [2020-09-16 14:12:50,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:50,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624880356] [2020-09-16 14:12:50,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492989856] [2020-09-16 14:12:50,970 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:51,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-16 14:12:51,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:51,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:12:51,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:51,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:51,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-16 14:12:51,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661293462] [2020-09-16 14:12:51,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:51,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:51,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:51,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:51,060 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-16 14:12:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:52,022 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-09-16 14:12:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 14:12:52,023 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-16 14:12:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:52,024 INFO L225 Difference]: With dead ends: 138 [2020-09-16 14:12:52,024 INFO L226 Difference]: Without dead ends: 132 [2020-09-16 14:12:52,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-09-16 14:12:52,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-16 14:12:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-09-16 14:12:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-16 14:12:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-16 14:12:52,027 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-16 14:12:52,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:52,027 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-16 14:12:52,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:12:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-16 14:12:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:12:52,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:52,027 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:52,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:52,228 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:52,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-09-16 14:12:52,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:52,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611199558] [2020-09-16 14:12:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:52,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611199558] [2020-09-16 14:12:52,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48424765] [2020-09-16 14:12:52,758 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:52,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:12:52,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:52,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:12:52,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:52,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:12:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:52,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:52,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-16 14:12:52,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362914725] [2020-09-16 14:12:52,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-16 14:12:52,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:52,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-16 14:12:52,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:12:52,878 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-16 14:12:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:54,049 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-09-16 14:12:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:12:54,050 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-16 14:12:54,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:54,051 INFO L225 Difference]: With dead ends: 137 [2020-09-16 14:12:54,051 INFO L226 Difference]: Without dead ends: 131 [2020-09-16 14:12:54,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-09-16 14:12:54,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-16 14:12:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-09-16 14:12:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-16 14:12:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-16 14:12:54,054 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-16 14:12:54,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:54,054 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-16 14:12:54,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-16 14:12:54,054 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-16 14:12:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:12:54,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:54,054 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:54,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-16 14:12:54,255 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:54,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:54,256 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-09-16 14:12:54,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:54,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330084967] [2020-09-16 14:12:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:54,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330084967] [2020-09-16 14:12:54,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706976096] [2020-09-16 14:12:54,742 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:54,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-16 14:12:54,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:54,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:12:54,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:54,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:54,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-16 14:12:54,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475648762] [2020-09-16 14:12:54,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:54,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:54,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:54,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:54,850 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-16 14:12:55,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:55,909 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-09-16 14:12:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:12:55,911 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-16 14:12:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:55,911 INFO L225 Difference]: With dead ends: 134 [2020-09-16 14:12:55,911 INFO L226 Difference]: Without dead ends: 128 [2020-09-16 14:12:55,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-09-16 14:12:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-16 14:12:55,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-09-16 14:12:55,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-16 14:12:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-16 14:12:55,914 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-16 14:12:55,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:55,914 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-16 14:12:55,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:12:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-16 14:12:55,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:12:55,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:55,915 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:56,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-16 14:12:56,116 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:56,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:56,116 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-09-16 14:12:56,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:56,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362086097] [2020-09-16 14:12:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:56,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362086097] [2020-09-16 14:12:56,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16514147] [2020-09-16 14:12:56,633 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:56,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-16 14:12:56,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:12:56,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:12:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:56,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:12:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:56,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:56,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-16 14:12:56,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352671806] [2020-09-16 14:12:56,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-16 14:12:56,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:56,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-16 14:12:56,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:12:56,772 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-16 14:12:58,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:12:58,070 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-09-16 14:12:58,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:12:58,071 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-16 14:12:58,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:12:58,072 INFO L225 Difference]: With dead ends: 133 [2020-09-16 14:12:58,072 INFO L226 Difference]: Without dead ends: 127 [2020-09-16 14:12:58,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-09-16 14:12:58,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-16 14:12:58,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-09-16 14:12:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-16 14:12:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-16 14:12:58,075 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-16 14:12:58,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:12:58,075 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-16 14:12:58,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-16 14:12:58,075 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-16 14:12:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:12:58,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:12:58,075 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:12:58,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-16 14:12:58,276 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:12:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:12:58,277 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-09-16 14:12:58,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:12:58,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947971887] [2020-09-16 14:12:58,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:12:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:58,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947971887] [2020-09-16 14:12:58,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697015336] [2020-09-16 14:12:58,772 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:12:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:12:58,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:12:58,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:12:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:12:58,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:12:58,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-16 14:12:58,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513898268] [2020-09-16 14:12:58,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:12:58,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:12:58,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:12:58,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:12:58,860 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-16 14:13:00,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:00,057 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-09-16 14:13:00,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-16 14:13:00,059 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-16 14:13:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:00,059 INFO L225 Difference]: With dead ends: 130 [2020-09-16 14:13:00,059 INFO L226 Difference]: Without dead ends: 124 [2020-09-16 14:13:00,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-09-16 14:13:00,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-16 14:13:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-09-16 14:13:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-16 14:13:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-16 14:13:00,062 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-16 14:13:00,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:00,062 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-16 14:13:00,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:13:00,062 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-16 14:13:00,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:13:00,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:00,063 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:00,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:00,264 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:00,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:00,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-09-16 14:13:00,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:00,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421076809] [2020-09-16 14:13:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:00,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421076809] [2020-09-16 14:13:00,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803711317] [2020-09-16 14:13:00,761 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:00,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:13:00,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:13:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:13:00,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:00,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:13:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:00,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:13:00,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-16 14:13:00,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771534723] [2020-09-16 14:13:00,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-16 14:13:00,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:00,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-16 14:13:00,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:13:00,884 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-16 14:13:02,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:02,371 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-09-16 14:13:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:13:02,373 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-16 14:13:02,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:02,373 INFO L225 Difference]: With dead ends: 129 [2020-09-16 14:13:02,373 INFO L226 Difference]: Without dead ends: 123 [2020-09-16 14:13:02,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-09-16 14:13:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-16 14:13:02,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-09-16 14:13:02,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-16 14:13:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-16 14:13:02,377 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-16 14:13:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:02,377 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-16 14:13:02,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-16 14:13:02,377 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-16 14:13:02,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:13:02,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:02,378 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:02,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-16 14:13:02,579 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:02,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:02,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-09-16 14:13:02,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:02,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131092254] [2020-09-16 14:13:02,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:03,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131092254] [2020-09-16 14:13:03,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603401870] [2020-09-16 14:13:03,048 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:03,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-16 14:13:03,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:13:03,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:13:03,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:03,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:13:03,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-16 14:13:03,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879921548] [2020-09-16 14:13:03,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:13:03,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:03,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:13:03,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:13:03,145 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-16 14:13:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:04,454 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-09-16 14:13:04,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-16 14:13:04,456 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-16 14:13:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:04,456 INFO L225 Difference]: With dead ends: 126 [2020-09-16 14:13:04,456 INFO L226 Difference]: Without dead ends: 120 [2020-09-16 14:13:04,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-09-16 14:13:04,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-16 14:13:04,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-09-16 14:13:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-16 14:13:04,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-16 14:13:04,460 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-16 14:13:04,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:04,460 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-16 14:13:04,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:13:04,460 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-16 14:13:04,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:13:04,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:04,460 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:04,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:04,661 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:04,662 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-09-16 14:13:04,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:04,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601322245] [2020-09-16 14:13:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:04,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:05,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601322245] [2020-09-16 14:13:05,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599663386] [2020-09-16 14:13:05,129 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:05,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:13:05,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:13:05,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:13:05,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:05,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:13:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:05,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:13:05,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-16 14:13:05,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10047461] [2020-09-16 14:13:05,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-16 14:13:05,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:05,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-16 14:13:05,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:13:05,260 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-16 14:13:06,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:06,890 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-09-16 14:13:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:13:06,891 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-16 14:13:06,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:06,892 INFO L225 Difference]: With dead ends: 125 [2020-09-16 14:13:06,892 INFO L226 Difference]: Without dead ends: 119 [2020-09-16 14:13:06,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-09-16 14:13:06,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-16 14:13:06,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-09-16 14:13:06,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-16 14:13:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-16 14:13:06,895 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-16 14:13:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:06,895 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-16 14:13:06,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-16 14:13:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-16 14:13:06,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:13:06,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:06,896 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:07,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-16 14:13:07,099 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:07,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:07,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-09-16 14:13:07,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:07,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844661275] [2020-09-16 14:13:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:07,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844661275] [2020-09-16 14:13:07,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962366241] [2020-09-16 14:13:07,566 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:07,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-16 14:13:07,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:13:07,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:13:07,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:07,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:13:07,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-16 14:13:07,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767822220] [2020-09-16 14:13:07,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:13:07,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:07,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:13:07,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:13:07,663 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-16 14:13:09,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:09,066 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-09-16 14:13:09,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-16 14:13:09,067 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-16 14:13:09,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:09,068 INFO L225 Difference]: With dead ends: 122 [2020-09-16 14:13:09,068 INFO L226 Difference]: Without dead ends: 116 [2020-09-16 14:13:09,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-09-16 14:13:09,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-16 14:13:09,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-09-16 14:13:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-16 14:13:09,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-16 14:13:09,081 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-16 14:13:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:09,081 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-16 14:13:09,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:13:09,081 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-16 14:13:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:13:09,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:09,082 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:09,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:09,283 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:09,283 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-09-16 14:13:09,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:09,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49158813] [2020-09-16 14:13:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:09,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49158813] [2020-09-16 14:13:09,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850066646] [2020-09-16 14:13:09,745 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:09,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-16 14:13:09,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:13:09,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:13:09,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:09,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:13:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:09,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:13:09,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-16 14:13:09,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042328388] [2020-09-16 14:13:09,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-16 14:13:09,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:09,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-16 14:13:09,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:13:09,877 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-16 14:13:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:11,600 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-09-16 14:13:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-16 14:13:11,602 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-16 14:13:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:11,602 INFO L225 Difference]: With dead ends: 121 [2020-09-16 14:13:11,602 INFO L226 Difference]: Without dead ends: 115 [2020-09-16 14:13:11,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-09-16 14:13:11,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-16 14:13:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-09-16 14:13:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-16 14:13:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-16 14:13:11,605 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-16 14:13:11,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:11,606 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-16 14:13:11,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-16 14:13:11,606 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-16 14:13:11,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:13:11,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:11,606 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:11,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-09-16 14:13:11,807 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:11,807 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-09-16 14:13:11,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:11,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184457759] [2020-09-16 14:13:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:12,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184457759] [2020-09-16 14:13:12,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310098555] [2020-09-16 14:13:12,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:12,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:13:12,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:12,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:13:12,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-16 14:13:12,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213761029] [2020-09-16 14:13:12,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:13:12,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:12,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:13:12,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:13:12,349 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-16 14:13:13,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:13,843 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-09-16 14:13:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-16 14:13:13,844 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-16 14:13:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:13,845 INFO L225 Difference]: With dead ends: 118 [2020-09-16 14:13:13,845 INFO L226 Difference]: Without dead ends: 112 [2020-09-16 14:13:13,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-09-16 14:13:13,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-16 14:13:13,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-09-16 14:13:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-16 14:13:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-16 14:13:13,848 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-16 14:13:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:13,848 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-16 14:13:13,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:13:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-16 14:13:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:13:13,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:13,848 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:14,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:14,049 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:14,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:14,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-09-16 14:13:14,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:14,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083380830] [2020-09-16 14:13:14,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:14,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083380830] [2020-09-16 14:13:14,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116318450] [2020-09-16 14:13:14,504 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:14,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:13:14,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:13:14,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:13:14,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:14,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:13:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:14,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:13:14,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-16 14:13:14,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61407891] [2020-09-16 14:13:14,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-16 14:13:14,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:14,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-16 14:13:14,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:13:14,635 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-16 14:13:16,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:16,505 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-09-16 14:13:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-16 14:13:16,506 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-16 14:13:16,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:16,507 INFO L225 Difference]: With dead ends: 117 [2020-09-16 14:13:16,507 INFO L226 Difference]: Without dead ends: 111 [2020-09-16 14:13:16,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-09-16 14:13:16,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-16 14:13:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-09-16 14:13:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-16 14:13:16,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-16 14:13:16,510 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-16 14:13:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:16,510 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-16 14:13:16,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-16 14:13:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-16 14:13:16,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:13:16,510 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:16,510 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:16,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:16,711 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:16,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:16,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-09-16 14:13:16,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:16,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254932062] [2020-09-16 14:13:16,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:17,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254932062] [2020-09-16 14:13:17,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011952567] [2020-09-16 14:13:17,151 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:17,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-16 14:13:17,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:13:17,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:13:17,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:17,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:13:17,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-16 14:13:17,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665176239] [2020-09-16 14:13:17,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:13:17,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:17,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:13:17,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:13:17,263 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-16 14:13:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:18,878 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-09-16 14:13:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-16 14:13:18,879 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-16 14:13:18,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:18,880 INFO L225 Difference]: With dead ends: 114 [2020-09-16 14:13:18,880 INFO L226 Difference]: Without dead ends: 108 [2020-09-16 14:13:18,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-09-16 14:13:18,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-16 14:13:18,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-09-16 14:13:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-16 14:13:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-16 14:13:18,883 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-16 14:13:18,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:18,884 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-16 14:13:18,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:13:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-16 14:13:18,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:13:18,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:18,884 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:19,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-16 14:13:19,085 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:19,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:19,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-09-16 14:13:19,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:19,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932787009] [2020-09-16 14:13:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:19,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932787009] [2020-09-16 14:13:19,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723803724] [2020-09-16 14:13:19,527 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:19,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:13:19,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:13:19,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:13:19,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:19,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:13:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:19,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:13:19,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-16 14:13:19,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4784566] [2020-09-16 14:13:19,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-16 14:13:19,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:19,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-16 14:13:19,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:13:19,659 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-16 14:13:21,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:21,763 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-16 14:13:21,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-16 14:13:21,765 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-16 14:13:21,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:21,765 INFO L225 Difference]: With dead ends: 113 [2020-09-16 14:13:21,766 INFO L226 Difference]: Without dead ends: 107 [2020-09-16 14:13:21,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-09-16 14:13:21,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-16 14:13:21,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-09-16 14:13:21,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-16 14:13:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-16 14:13:21,769 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-16 14:13:21,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:21,769 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-16 14:13:21,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-16 14:13:21,769 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-16 14:13:21,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:13:21,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:21,769 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:21,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-16 14:13:21,970 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:21,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-09-16 14:13:21,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:21,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182743823] [2020-09-16 14:13:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:22,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182743823] [2020-09-16 14:13:22,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866427463] [2020-09-16 14:13:22,413 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:22,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-16 14:13:22,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:13:22,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:13:22,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:22,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:13:22,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-16 14:13:22,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717045927] [2020-09-16 14:13:22,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:13:22,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:22,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:13:22,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:13:22,536 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-16 14:13:24,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:24,242 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-09-16 14:13:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-16 14:13:24,244 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-16 14:13:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:24,244 INFO L225 Difference]: With dead ends: 110 [2020-09-16 14:13:24,245 INFO L226 Difference]: Without dead ends: 104 [2020-09-16 14:13:24,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-09-16 14:13:24,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-16 14:13:24,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-09-16 14:13:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-16 14:13:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-16 14:13:24,247 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-16 14:13:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:24,247 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-16 14:13:24,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:13:24,247 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-16 14:13:24,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:13:24,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:24,248 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:24,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-16 14:13:24,449 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:24,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-09-16 14:13:24,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:24,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389542341] [2020-09-16 14:13:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:24,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389542341] [2020-09-16 14:13:24,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517831155] [2020-09-16 14:13:24,903 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:24,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-16 14:13:24,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:13:24,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:13:24,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:25,015 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:13:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:25,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:13:25,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-16 14:13:25,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809739757] [2020-09-16 14:13:25,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-16 14:13:25,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:25,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-16 14:13:25,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:13:25,043 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-16 14:13:27,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:27,253 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-09-16 14:13:27,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-16 14:13:27,254 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-16 14:13:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:27,255 INFO L225 Difference]: With dead ends: 109 [2020-09-16 14:13:27,255 INFO L226 Difference]: Without dead ends: 103 [2020-09-16 14:13:27,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-09-16 14:13:27,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-16 14:13:27,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-09-16 14:13:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-16 14:13:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-16 14:13:27,258 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-16 14:13:27,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:27,258 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-16 14:13:27,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-16 14:13:27,258 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-16 14:13:27,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:13:27,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:27,259 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:27,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-16 14:13:27,459 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:27,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:27,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-09-16 14:13:27,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:27,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844627098] [2020-09-16 14:13:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:27,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844627098] [2020-09-16 14:13:27,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914253448] [2020-09-16 14:13:27,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:27,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:13:27,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:28,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:13:28,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-16 14:13:28,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411556062] [2020-09-16 14:13:28,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-16 14:13:28,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:28,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-16 14:13:28,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:13:28,002 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-16 14:13:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:29,815 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-09-16 14:13:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-16 14:13:29,817 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-16 14:13:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:29,817 INFO L225 Difference]: With dead ends: 125 [2020-09-16 14:13:29,817 INFO L226 Difference]: Without dead ends: 119 [2020-09-16 14:13:29,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-09-16 14:13:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-16 14:13:29,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-09-16 14:13:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-16 14:13:29,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-09-16 14:13:29,820 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-09-16 14:13:29,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:29,820 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-09-16 14:13:29,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-16 14:13:29,820 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-09-16 14:13:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:13:29,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:29,821 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:30,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-16 14:13:30,025 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:30,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:30,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-09-16 14:13:30,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:30,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892815887] [2020-09-16 14:13:30,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:30,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892815887] [2020-09-16 14:13:30,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661397413] [2020-09-16 14:13:30,475 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:30,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:13:30,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:13:30,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-16 14:13:30,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:30,613 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:30,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:13:30,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-16 14:13:30,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403225484] [2020-09-16 14:13:30,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-16 14:13:30,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:30,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-16 14:13:30,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:13:30,615 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-09-16 14:13:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:32,637 INFO L93 Difference]: Finished difference Result 104 states and 261 transitions. [2020-09-16 14:13:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-16 14:13:32,638 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-16 14:13:32,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:32,638 INFO L225 Difference]: With dead ends: 104 [2020-09-16 14:13:32,638 INFO L226 Difference]: Without dead ends: 96 [2020-09-16 14:13:32,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-09-16 14:13:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-16 14:13:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2020-09-16 14:13:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-16 14:13:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-09-16 14:13:32,642 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-09-16 14:13:32,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:32,642 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-09-16 14:13:32,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-16 14:13:32,642 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-09-16 14:13:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-16 14:13:32,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:32,643 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:32,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:32,850 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:32,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:32,851 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-09-16 14:13:32,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:32,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151626100] [2020-09-16 14:13:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:33,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151626100] [2020-09-16 14:13:33,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753017745] [2020-09-16 14:13:33,292 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:33,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-16 14:13:33,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:13:33,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-16 14:13:33,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:33,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:13:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:33,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:13:33,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-16 14:13:33,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741426106] [2020-09-16 14:13:33,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-16 14:13:33,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:33,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-16 14:13:33,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:13:33,443 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-09-16 14:13:35,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:35,566 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-09-16 14:13:35,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-16 14:13:35,568 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-16 14:13:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:35,569 INFO L225 Difference]: With dead ends: 124 [2020-09-16 14:13:35,569 INFO L226 Difference]: Without dead ends: 119 [2020-09-16 14:13:35,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-09-16 14:13:35,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-16 14:13:35,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-09-16 14:13:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-16 14:13:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-09-16 14:13:35,572 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-09-16 14:13:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:35,572 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-09-16 14:13:35,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-16 14:13:35,572 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-09-16 14:13:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-16 14:13:35,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:35,572 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:35,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-16 14:13:35,773 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:35,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:35,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-09-16 14:13:35,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:35,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986926381] [2020-09-16 14:13:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 72 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:36,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986926381] [2020-09-16 14:13:36,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049257009] [2020-09-16 14:13:36,027 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:36,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:13:36,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:13:36,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:13:36,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:36,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-16 14:13:36,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-09-16 14:13:36,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160583407] [2020-09-16 14:13:36,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:13:36,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:36,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:13:36,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:13:36,139 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 13 states. [2020-09-16 14:13:36,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:36,185 INFO L93 Difference]: Finished difference Result 421 states and 1013 transitions. [2020-09-16 14:13:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:13:36,187 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-09-16 14:13:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:36,187 INFO L225 Difference]: With dead ends: 421 [2020-09-16 14:13:36,187 INFO L226 Difference]: Without dead ends: 70 [2020-09-16 14:13:36,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-09-16 14:13:36,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-16 14:13:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-09-16 14:13:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-16 14:13:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 140 transitions. [2020-09-16 14:13:36,189 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 140 transitions. Word has length 29 [2020-09-16 14:13:36,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:36,189 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 140 transitions. [2020-09-16 14:13:36,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:13:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 140 transitions. [2020-09-16 14:13:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-16 14:13:36,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:13:36,190 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:13:36,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:36,397 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:13:36,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:13:36,398 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-09-16 14:13:36,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:13:36,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682139573] [2020-09-16 14:13:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:13:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:13:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:37,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682139573] [2020-09-16 14:13:37,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40895010] [2020-09-16 14:13:37,178 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:37,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-16 14:13:37,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:13:37,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:13:37,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:13:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:13:37,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-16 14:13:37,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [23] total 36 [2020-09-16 14:13:37,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037672541] [2020-09-16 14:13:37,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 14:13:37,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:13:37,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 14:13:37,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:13:37,722 INFO L87 Difference]: Start difference. First operand 70 states and 140 transitions. Second operand 13 states. [2020-09-16 14:13:37,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:13:37,769 INFO L93 Difference]: Finished difference Result 256 states and 475 transitions. [2020-09-16 14:13:37,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:13:37,770 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-09-16 14:13:37,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:13:37,771 INFO L225 Difference]: With dead ends: 256 [2020-09-16 14:13:37,771 INFO L226 Difference]: Without dead ends: 0 [2020-09-16 14:13:37,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:13:37,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-16 14:13:37,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-16 14:13:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-16 14:13:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-16 14:13:37,773 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-09-16 14:13:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:13:37,773 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-16 14:13:37,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 14:13:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-16 14:13:37,773 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-16 14:13:37,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:13:37,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 02:13:37 BasicIcfg [2020-09-16 14:13:37,986 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-16 14:13:37,988 INFO L168 Benchmark]: Toolchain (without parser) took 330579.89 ms. Allocated memory was 140.5 MB in the beginning and 196.1 MB in the end (delta: 55.6 MB). Free memory was 101.5 MB in the beginning and 74.9 MB in the end (delta: 26.7 MB). Peak memory consumption was 82.2 MB. Max. memory is 7.1 GB. [2020-09-16 14:13:37,989 INFO L168 Benchmark]: CDTParser took 1.51 ms. Allocated memory is still 140.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-16 14:13:37,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 824.00 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 100.9 MB in the beginning and 162.4 MB in the end (delta: -61.5 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-09-16 14:13:37,990 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.72 ms. Allocated memory is still 202.4 MB. Free memory was 162.4 MB in the beginning and 160.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-16 14:13:37,990 INFO L168 Benchmark]: Boogie Preprocessor took 35.19 ms. Allocated memory is still 202.4 MB. Free memory was 160.4 MB in the beginning and 158.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-16 14:13:37,990 INFO L168 Benchmark]: RCFGBuilder took 434.92 ms. Allocated memory is still 202.4 MB. Free memory was 158.4 MB in the beginning and 138.5 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-09-16 14:13:37,991 INFO L168 Benchmark]: TraceAbstraction took 329190.60 ms. Allocated memory was 202.4 MB in the beginning and 196.1 MB in the end (delta: -6.3 MB). Free memory was 137.8 MB in the beginning and 74.9 MB in the end (delta: 63.0 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. [2020-09-16 14:13:37,993 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.51 ms. Allocated memory is still 140.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 824.00 ms. Allocated memory was 140.5 MB in the beginning and 202.4 MB in the end (delta: 61.9 MB). Free memory was 100.9 MB in the beginning and 162.4 MB in the end (delta: -61.5 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 80.72 ms. Allocated memory is still 202.4 MB. Free memory was 162.4 MB in the beginning and 160.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.19 ms. Allocated memory is still 202.4 MB. Free memory was 160.4 MB in the beginning and 158.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 434.92 ms. Allocated memory is still 202.4 MB. Free memory was 158.4 MB in the beginning and 138.5 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 329190.60 ms. Allocated memory was 202.4 MB in the beginning and 196.1 MB in the end (delta: -6.3 MB). Free memory was 137.8 MB in the beginning and 74.9 MB in the end (delta: 63.0 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: 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, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 329.0s, OverallIterations: 241, TraceHistogramMax: 11, AutomataDifference: 191.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 3935 SDtfs, 13973 SDslu, 25157 SDs, 0 SdLazy, 27289 SolverSat, 16264 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13658 GetRequests, 4494 SyntacticMatches, 234 SemanticMatches, 8930 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91491 ImplicationChecksByTransitivity, 198.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 241 MinimizatonAttempts, 6070 StatesRemovedByMinimization, 238 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.3s SsaConstructionTime, 7.1s SatisfiabilityAnalysisTime, 68.4s InterpolantComputationTime, 10246 NumberOfCodeBlocks, 10244 NumberOfCodeBlocksAsserted, 1270 NumberOfCheckSat, 9769 ConstructedInterpolants, 0 QuantifiedInterpolants, 956995 SizeOfPredicates, 3171 NumberOfNonLiveVariables, 31166 ConjunctsInSsa, 4133 ConjunctsInUnsatCore, 477 InterpolantComputations, 7 PerfectInterpolantSequences, 272/21430 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...