/usr/bin/java -Xmx16000000000 -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-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 11:04:41,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 11:04:41,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 11:04:41,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 11:04:41,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 11:04:41,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 11:04:41,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 11:04:41,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 11:04:41,704 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 11:04:41,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 11:04:41,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 11:04:41,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 11:04:41,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 11:04:41,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 11:04:41,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 11:04:41,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 11:04:41,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 11:04:41,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 11:04:41,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 11:04:41,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 11:04:41,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 11:04:41,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 11:04:41,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 11:04:41,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 11:04:41,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 11:04:41,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 11:04:41,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 11:04:41,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 11:04:41,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 11:04:41,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 11:04:41,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 11:04:41,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 11:04:41,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 11:04:41,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 11:04:41,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 11:04:41,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 11:04:41,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 11:04:41,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 11:04:41,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 11:04:41,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 11:04:41,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 11:04:41,733 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 [2020-10-09 11:04:41,766 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 11:04:41,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 11:04:41,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 11:04:41,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 11:04:41,768 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 11:04:41,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 11:04:41,769 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 11:04:41,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 11:04:41,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 11:04:41,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 11:04:41,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 11:04:41,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 11:04:41,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 11:04:41,771 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 11:04:41,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 11:04:41,772 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 11:04:41,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 11:04:41,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 11:04:41,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 11:04:41,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 11:04:41,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 11:04:41,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 11:04:41,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 11:04:41,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 11:04:41,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 11:04:41,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-09 11:04:41,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 11:04:41,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-09 11:04:41,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-09 11:04:41,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 11:04:42,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 11:04:42,130 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 11:04:42,133 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 11:04:42,135 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 11:04:42,135 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 11:04:42,136 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-10-09 11:04:42,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb02b1e26/b37697ea0d23444c8c4623b4bf95754c/FLAG633a69ac8 [2020-10-09 11:04:42,668 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 11:04:42,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-10-09 11:04:42,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb02b1e26/b37697ea0d23444c8c4623b4bf95754c/FLAG633a69ac8 [2020-10-09 11:04:43,035 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb02b1e26/b37697ea0d23444c8c4623b4bf95754c [2020-10-09 11:04:43,044 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 11:04:43,046 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 11:04:43,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 11:04:43,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 11:04:43,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 11:04:43,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 11:04:43" (1/1) ... [2020-10-09 11:04:43,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11584aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 11:04:43, skipping insertion in model container [2020-10-09 11:04:43,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 11:04:43" (1/1) ... [2020-10-09 11:04:43,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 11:04:43,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 11:04:43,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 11:04:43,639 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 11:04:43,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 11:04:43,769 INFO L208 MainTranslator]: Completed translation [2020-10-09 11:04:43,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 11:04:43 WrapperNode [2020-10-09 11:04:43,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 11:04:43,771 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 11:04:43,771 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 11:04:43,771 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 11:04:43,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 11:04:43" (1/1) ... [2020-10-09 11:04:43,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 11:04:43" (1/1) ... [2020-10-09 11:04:43,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 11:04:43,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 11:04:43,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 11:04:43,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 11:04:43,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 11:04:43" (1/1) ... [2020-10-09 11:04:43,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 11:04:43" (1/1) ... [2020-10-09 11:04:43,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 11:04:43" (1/1) ... [2020-10-09 11:04:43,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 11:04:43" (1/1) ... [2020-10-09 11:04:43,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 11:04:43" (1/1) ... [2020-10-09 11:04:43,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 11:04:43" (1/1) ... [2020-10-09 11:04:43,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 11:04:43" (1/1) ... [2020-10-09 11:04:43,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 11:04:43,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 11:04:43,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 11:04:43,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 11:04:43,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 11:04:43" (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 [2020-10-09 11:04:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-09 11:04:43,909 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-09 11:04:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-09 11:04:43,910 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-09 11:04:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 11:04:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 11:04:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 11:04:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 11:04:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 11:04:43,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 11:04:43,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 11:04:43,912 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 11:04:44,263 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 11:04:44,263 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-09 11:04:44,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 11:04:44 BoogieIcfgContainer [2020-10-09 11:04:44,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 11:04:44,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 11:04:44,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 11:04:44,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 11:04:44,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 11:04:43" (1/3) ... [2020-10-09 11:04:44,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af4e895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 11:04:44, skipping insertion in model container [2020-10-09 11:04:44,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 11:04:43" (2/3) ... [2020-10-09 11:04:44,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af4e895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 11:04:44, skipping insertion in model container [2020-10-09 11:04:44,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 11:04:44" (3/3) ... [2020-10-09 11:04:44,280 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-10-09 11:04:44,292 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-09 11:04:44,293 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 11:04:44,301 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 11:04:44,302 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 11:04:44,332 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,333 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,333 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,333 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,334 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,334 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,334 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,335 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,335 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,335 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,335 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,336 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,336 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,336 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,337 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,337 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,337 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,337 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,337 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,337 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,338 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,338 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,338 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,339 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,339 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,339 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,339 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,339 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,342 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,343 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,343 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,343 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,343 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,344 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,350 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,350 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 11:04:44,363 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 11:04:44,385 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 11:04:44,385 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-09 11:04:44,385 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 11:04:44,385 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 11:04:44,385 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 11:04:44,386 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 11:04:44,386 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 11:04:44,386 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 11:04:44,397 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-09 11:04:44,400 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-09 11:04:44,403 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-09 11:04:44,405 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-09 11:04:44,443 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-09 11:04:44,443 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 11:04:44,448 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. [2020-10-09 11:04:44,451 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-09 11:04:45,622 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-09 11:04:45,622 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-09 11:04:45,629 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-09 11:04:45,641 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-09 11:04:45,643 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-09 11:04:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-09 11:04:45,650 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:45,651 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-09 11:04:45,651 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:45,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-09 11:04:45,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:45,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345055756] [2020-10-09 11:04:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:45,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345055756] [2020-10-09 11:04:45,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 11:04:45,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-09 11:04:45,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485938730] [2020-10-09 11:04:45,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 11:04:45,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:45,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 11:04:45,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-09 11:04:45,907 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-09 11:04:45,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:45,977 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-09 11:04:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 11:04:45,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-09 11:04:45,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:45,990 INFO L225 Difference]: With dead ends: 75 [2020-10-09 11:04:45,990 INFO L226 Difference]: Without dead ends: 42 [2020-10-09 11:04:45,991 INFO L673 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 [2020-10-09 11:04:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-09 11:04:46,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-09 11:04:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-09 11:04:46,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-09 11:04:46,030 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-09 11:04:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:46,030 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-09 11:04:46,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 11:04:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-09 11:04:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 11:04:46,031 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:46,031 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:46,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-09 11:04:46,032 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:46,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:46,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-09 11:04:46,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:46,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930179770] [2020-10-09 11:04:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:46,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930179770] [2020-10-09 11:04:46,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 11:04:46,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 11:04:46,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695185267] [2020-10-09 11:04:46,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 11:04:46,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:46,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 11:04:46,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-09 11:04:46,127 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-09 11:04:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:46,155 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-09 11:04:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 11:04:46,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-09 11:04:46,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:46,157 INFO L225 Difference]: With dead ends: 56 [2020-10-09 11:04:46,157 INFO L226 Difference]: Without dead ends: 50 [2020-10-09 11:04:46,158 INFO L673 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 [2020-10-09 11:04:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-09 11:04:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-09 11:04:46,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-09 11:04:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-09 11:04:46,166 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-09 11:04:46,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:46,167 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-09 11:04:46,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 11:04:46,167 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-09 11:04:46,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 11:04:46,168 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:46,169 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:46,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-09 11:04:46,169 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:46,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:46,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-09 11:04:46,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:46,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053618268] [2020-10-09 11:04:46,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:46,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053618268] [2020-10-09 11:04:46,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 11:04:46,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 11:04:46,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191010651] [2020-10-09 11:04:46,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 11:04:46,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:46,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 11:04:46,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-09 11:04:46,261 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-09 11:04:46,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:46,336 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-09 11:04:46,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 11:04:46,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 11:04:46,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:46,338 INFO L225 Difference]: With dead ends: 78 [2020-10-09 11:04:46,339 INFO L226 Difference]: Without dead ends: 71 [2020-10-09 11:04:46,339 INFO L673 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 [2020-10-09 11:04:46,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-09 11:04:46,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-09 11:04:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-09 11:04:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-09 11:04:46,349 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-09 11:04:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:46,349 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-09 11:04:46,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 11:04:46,350 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-09 11:04:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 11:04:46,351 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:46,351 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:46,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-09 11:04:46,351 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:46,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:46,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-09 11:04:46,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:46,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520279721] [2020-10-09 11:04:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:46,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520279721] [2020-10-09 11:04:46,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 11:04:46,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 11:04:46,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575890575] [2020-10-09 11:04:46,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 11:04:46,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:46,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 11:04:46,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-09 11:04:46,434 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-09 11:04:46,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:46,518 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-09 11:04:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 11:04:46,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 11:04:46,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:46,519 INFO L225 Difference]: With dead ends: 54 [2020-10-09 11:04:46,520 INFO L226 Difference]: Without dead ends: 43 [2020-10-09 11:04:46,520 INFO L673 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 [2020-10-09 11:04:46,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-09 11:04:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-09 11:04:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-09 11:04:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-09 11:04:46,526 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-09 11:04:46,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:46,527 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-09 11:04:46,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 11:04:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-09 11:04:46,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 11:04:46,528 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:46,528 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:46,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-09 11:04:46,529 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:46,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:46,529 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-09 11:04:46,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:46,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574877583] [2020-10-09 11:04:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:46,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574877583] [2020-10-09 11:04:46,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 11:04:46,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 11:04:46,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050320050] [2020-10-09 11:04:46,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 11:04:46,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:46,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 11:04:46,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-09 11:04:46,644 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-09 11:04:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:46,707 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-09 11:04:46,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 11:04:46,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 11:04:46,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:46,708 INFO L225 Difference]: With dead ends: 57 [2020-10-09 11:04:46,709 INFO L226 Difference]: Without dead ends: 51 [2020-10-09 11:04:46,709 INFO L673 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 [2020-10-09 11:04:46,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-09 11:04:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-09 11:04:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-09 11:04:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-09 11:04:46,714 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-09 11:04:46,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:46,714 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-09 11:04:46,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 11:04:46,715 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-09 11:04:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 11:04:46,715 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:46,715 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:46,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-09 11:04:46,716 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:46,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:46,716 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-09 11:04:46,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:46,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911088448] [2020-10-09 11:04:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:46,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911088448] [2020-10-09 11:04:46,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345179079] [2020-10-09 11:04:46,775 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 [2020-10-09 11:04:46,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:04:46,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:46,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 11:04:46,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:46,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:04:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:46,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:46,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-09 11:04:46,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494869938] [2020-10-09 11:04:46,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 11:04:46,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:46,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 11:04:46,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-09 11:04:46,906 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-09 11:04:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:47,007 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-09 11:04:47,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 11:04:47,008 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-09 11:04:47,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:47,008 INFO L225 Difference]: With dead ends: 48 [2020-10-09 11:04:47,009 INFO L226 Difference]: Without dead ends: 43 [2020-10-09 11:04:47,009 INFO L673 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 [2020-10-09 11:04:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-09 11:04:47,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-09 11:04:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-09 11:04:47,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-09 11:04:47,014 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-09 11:04:47,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:47,015 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-09 11:04:47,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 11:04:47,015 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-09 11:04:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 11:04:47,016 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:47,016 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:47,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-09 11:04:47,219 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:47,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:47,220 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-09 11:04:47,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:47,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868520713] [2020-10-09 11:04:47,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:47,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868520713] [2020-10-09 11:04:47,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277462400] [2020-10-09 11:04:47,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:04:47,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:04:47,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:47,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 11:04:47,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:47,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:47,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-09 11:04:47,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541025614] [2020-10-09 11:04:47,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-09 11:04:47,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:47,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-09 11:04:47,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-09 11:04:47,363 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-09 11:04:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:47,425 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-09 11:04:47,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 11:04:47,425 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-09 11:04:47,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:47,426 INFO L225 Difference]: With dead ends: 54 [2020-10-09 11:04:47,426 INFO L226 Difference]: Without dead ends: 48 [2020-10-09 11:04:47,427 INFO L673 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 [2020-10-09 11:04:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-09 11:04:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-09 11:04:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-09 11:04:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-09 11:04:47,432 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-09 11:04:47,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:47,433 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-09 11:04:47,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-09 11:04:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-09 11:04:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 11:04:47,434 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:47,434 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:47,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:04:47,647 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:47,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:47,647 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-09 11:04:47,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:47,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84648352] [2020-10-09 11:04:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:47,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84648352] [2020-10-09 11:04:47,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800488907] [2020-10-09 11:04:47,741 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 [2020-10-09 11:04:47,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 11:04:47,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:47,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 11:04:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:47,803 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:04:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:47,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:47,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-09 11:04:47,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550857855] [2020-10-09 11:04:47,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 11:04:47,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:47,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 11:04:47,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-09 11:04:47,818 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-09 11:04:47,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:47,909 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-09 11:04:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 11:04:47,909 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-09 11:04:47,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:47,911 INFO L225 Difference]: With dead ends: 58 [2020-10-09 11:04:47,911 INFO L226 Difference]: Without dead ends: 52 [2020-10-09 11:04:47,912 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-09 11:04:47,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-09 11:04:47,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-09 11:04:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-09 11:04:47,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-09 11:04:47,917 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-09 11:04:47,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:47,918 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-09 11:04:47,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 11:04:47,918 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-09 11:04:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 11:04:47,919 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:47,919 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:48,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:04:48,133 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:48,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:48,134 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-09 11:04:48,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:48,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798729137] [2020-10-09 11:04:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:48,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798729137] [2020-10-09 11:04:48,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641669233] [2020-10-09 11:04:48,190 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 [2020-10-09 11:04:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:48,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 11:04:48,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:48,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:48,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-09 11:04:48,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863172673] [2020-10-09 11:04:48,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-09 11:04:48,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:48,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-09 11:04:48,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-09 11:04:48,291 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-09 11:04:48,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:48,417 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-09 11:04:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 11:04:48,420 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-09 11:04:48,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:48,421 INFO L225 Difference]: With dead ends: 78 [2020-10-09 11:04:48,421 INFO L226 Difference]: Without dead ends: 72 [2020-10-09 11:04:48,422 INFO L673 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 [2020-10-09 11:04:48,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-09 11:04:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-09 11:04:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-09 11:04:48,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-09 11:04:48,432 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-09 11:04:48,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:48,435 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-09 11:04:48,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-09 11:04:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-09 11:04:48,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 11:04:48,452 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:48,452 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:48,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:04:48,652 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:48,653 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-09 11:04:48,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:48,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063172376] [2020-10-09 11:04:48,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:48,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063172376] [2020-10-09 11:04:48,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397569762] [2020-10-09 11:04:48,730 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 [2020-10-09 11:04:48,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:04:48,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:48,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 11:04:48,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:48,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:04:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:48,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:48,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-09 11:04:48,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219604909] [2020-10-09 11:04:48,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 11:04:48,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:48,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 11:04:48,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-09 11:04:48,817 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-09 11:04:48,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:48,972 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-09 11:04:48,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 11:04:48,973 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-09 11:04:48,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:48,973 INFO L225 Difference]: With dead ends: 62 [2020-10-09 11:04:48,974 INFO L226 Difference]: Without dead ends: 54 [2020-10-09 11:04:48,974 INFO L673 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 [2020-10-09 11:04:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-09 11:04:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-09 11:04:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-09 11:04:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-09 11:04:48,979 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-09 11:04:48,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:48,979 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-09 11:04:48,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 11:04:48,979 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-09 11:04:48,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 11:04:48,980 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:48,980 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:49,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-09 11:04:49,181 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-09 11:04:49,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:49,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881813848] [2020-10-09 11:04:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:49,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881813848] [2020-10-09 11:04:49,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879282908] [2020-10-09 11:04:49,241 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 [2020-10-09 11:04:49,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 11:04:49,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:49,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 11:04:49,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:49,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:49,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-09 11:04:49,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387355280] [2020-10-09 11:04:49,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 11:04:49,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:49,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 11:04:49,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-09 11:04:49,311 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-09 11:04:49,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:49,405 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-09 11:04:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 11:04:49,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-09 11:04:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:49,407 INFO L225 Difference]: With dead ends: 64 [2020-10-09 11:04:49,407 INFO L226 Difference]: Without dead ends: 58 [2020-10-09 11:04:49,408 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 11:04:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-09 11:04:49,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-09 11:04:49,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-09 11:04:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-09 11:04:49,415 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-09 11:04:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:49,415 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-09 11:04:49,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 11:04:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-09 11:04:49,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 11:04:49,416 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:49,416 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:49,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:04:49,631 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:49,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:49,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-09 11:04:49,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:49,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438806734] [2020-10-09 11:04:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:49,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438806734] [2020-10-09 11:04:49,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743358035] [2020-10-09 11:04:49,707 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 [2020-10-09 11:04:49,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:04:49,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:49,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 11:04:49,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:49,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:04:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:49,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:49,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-09 11:04:49,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756180529] [2020-10-09 11:04:49,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 11:04:49,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:49,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 11:04:49,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-09 11:04:49,784 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-09 11:04:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:49,945 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-09 11:04:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 11:04:49,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-09 11:04:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:49,946 INFO L225 Difference]: With dead ends: 61 [2020-10-09 11:04:49,946 INFO L226 Difference]: Without dead ends: 55 [2020-10-09 11:04:49,947 INFO L673 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 [2020-10-09 11:04:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-09 11:04:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-09 11:04:49,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-09 11:04:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-09 11:04:49,952 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-09 11:04:49,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:49,952 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-09 11:04:49,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 11:04:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-09 11:04:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 11:04:49,953 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:49,954 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:50,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:04:50,164 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:50,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-09 11:04:50,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:50,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929291032] [2020-10-09 11:04:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:50,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929291032] [2020-10-09 11:04:50,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288416648] [2020-10-09 11:04:50,241 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 [2020-10-09 11:04:50,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:04:50,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:50,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 11:04:50,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:50,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:50,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-09 11:04:50,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70874456] [2020-10-09 11:04:50,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 11:04:50,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:50,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 11:04:50,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-09 11:04:50,311 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-09 11:04:50,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:50,461 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-09 11:04:50,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 11:04:50,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-09 11:04:50,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:50,463 INFO L225 Difference]: With dead ends: 77 [2020-10-09 11:04:50,463 INFO L226 Difference]: Without dead ends: 71 [2020-10-09 11:04:50,464 INFO L673 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 [2020-10-09 11:04:50,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-09 11:04:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-09 11:04:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-09 11:04:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-09 11:04:50,468 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-09 11:04:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:50,468 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-09 11:04:50,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 11:04:50,469 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-09 11:04:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 11:04:50,469 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:50,470 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:50,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-09 11:04:50,682 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:50,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:50,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-09 11:04:50,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:50,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761597338] [2020-10-09 11:04:50,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:50,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761597338] [2020-10-09 11:04:50,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567528152] [2020-10-09 11:04:50,742 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 [2020-10-09 11:04:50,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 11:04:50,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:50,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 11:04:50,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:50,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:04:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:50,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:50,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-09 11:04:50,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871995984] [2020-10-09 11:04:50,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 11:04:50,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:50,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 11:04:50,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-09 11:04:50,852 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-09 11:04:51,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:51,066 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-09 11:04:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 11:04:51,066 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-09 11:04:51,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:51,067 INFO L225 Difference]: With dead ends: 58 [2020-10-09 11:04:51,067 INFO L226 Difference]: Without dead ends: 50 [2020-10-09 11:04:51,068 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:04:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-09 11:04:51,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-09 11:04:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-09 11:04:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-09 11:04:51,071 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-09 11:04:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:51,071 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-09 11:04:51,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 11:04:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-09 11:04:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 11:04:51,072 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:51,072 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:51,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:04:51,273 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:51,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-09 11:04:51,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:51,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163601244] [2020-10-09 11:04:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:51,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163601244] [2020-10-09 11:04:51,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265849047] [2020-10-09 11:04:51,326 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 [2020-10-09 11:04:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:51,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 11:04:51,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:51,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:04:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:51,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:51,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-09 11:04:51,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320061845] [2020-10-09 11:04:51,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 11:04:51,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:51,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 11:04:51,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-09 11:04:51,396 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-09 11:04:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:51,561 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-09 11:04:51,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 11:04:51,562 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-09 11:04:51,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:51,562 INFO L225 Difference]: With dead ends: 60 [2020-10-09 11:04:51,563 INFO L226 Difference]: Without dead ends: 55 [2020-10-09 11:04:51,563 INFO L673 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 [2020-10-09 11:04:51,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-09 11:04:51,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-09 11:04:51,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-09 11:04:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-09 11:04:51,567 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-09 11:04:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:51,567 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-09 11:04:51,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 11:04:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-09 11:04:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 11:04:51,568 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:51,569 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:51,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-09 11:04:51,779 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:51,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:51,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-09 11:04:51,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:51,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189911742] [2020-10-09 11:04:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:51,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189911742] [2020-10-09 11:04:51,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117066517] [2020-10-09 11:04:51,855 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 [2020-10-09 11:04:51,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:04:51,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:51,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 11:04:51,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:51,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:04:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:51,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:51,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-09 11:04:51,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688625670] [2020-10-09 11:04:51,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 11:04:51,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:51,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 11:04:51,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-09 11:04:51,948 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-09 11:04:52,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:52,132 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-09 11:04:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 11:04:52,132 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-09 11:04:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:52,133 INFO L225 Difference]: With dead ends: 54 [2020-10-09 11:04:52,133 INFO L226 Difference]: Without dead ends: 49 [2020-10-09 11:04:52,134 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:04:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-09 11:04:52,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-09 11:04:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-09 11:04:52,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-09 11:04:52,136 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-09 11:04:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:52,137 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-09 11:04:52,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 11:04:52,137 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-09 11:04:52,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 11:04:52,137 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:52,138 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:52,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-09 11:04:52,341 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:52,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:52,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-09 11:04:52,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:52,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513626949] [2020-10-09 11:04:52,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:52,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513626949] [2020-10-09 11:04:52,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306156840] [2020-10-09 11:04:52,412 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 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 [2020-10-09 11:04:52,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 11:04:52,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:52,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 11:04:52,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:52,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:52,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-09 11:04:52,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871911010] [2020-10-09 11:04:52,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 11:04:52,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:52,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 11:04:52,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-09 11:04:52,468 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-09 11:04:52,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:52,569 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-09 11:04:52,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 11:04:52,570 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-09 11:04:52,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:52,570 INFO L225 Difference]: With dead ends: 60 [2020-10-09 11:04:52,571 INFO L226 Difference]: Without dead ends: 54 [2020-10-09 11:04:52,571 INFO L673 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 [2020-10-09 11:04:52,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-09 11:04:52,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-09 11:04:52,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-09 11:04:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-09 11:04:52,574 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-09 11:04:52,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:52,575 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-09 11:04:52,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 11:04:52,575 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-09 11:04:52,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 11:04:52,576 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:52,576 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:52,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-09 11:04:52,784 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:52,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:52,785 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-09 11:04:52,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:52,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170990608] [2020-10-09 11:04:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:52,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170990608] [2020-10-09 11:04:52,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301602728] [2020-10-09 11:04:52,851 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 [2020-10-09 11:04:52,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:04:52,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:52,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 11:04:52,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:52,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:04:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:52,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:52,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-09 11:04:52,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218673513] [2020-10-09 11:04:52,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 11:04:52,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:52,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 11:04:52,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 11:04:52,940 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-09 11:04:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:53,072 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-09 11:04:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 11:04:53,073 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-09 11:04:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:53,074 INFO L225 Difference]: With dead ends: 66 [2020-10-09 11:04:53,074 INFO L226 Difference]: Without dead ends: 60 [2020-10-09 11:04:53,075 INFO L673 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 [2020-10-09 11:04:53,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-09 11:04:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-09 11:04:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-09 11:04:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-09 11:04:53,080 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-09 11:04:53,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:53,080 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-09 11:04:53,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 11:04:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-09 11:04:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 11:04:53,081 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:53,081 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:53,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-09 11:04:53,292 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:53,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:53,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-09 11:04:53,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:53,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687274818] [2020-10-09 11:04:53,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:53,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687274818] [2020-10-09 11:04:53,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190698437] [2020-10-09 11:04:53,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:04:53,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 11:04:53,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:53,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 11:04:53,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:53,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:53,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-09 11:04:53,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683127007] [2020-10-09 11:04:53,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 11:04:53,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:53,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 11:04:53,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-09 11:04:53,410 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-09 11:04:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:53,556 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-09 11:04:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 11:04:53,557 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-09 11:04:53,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:53,558 INFO L225 Difference]: With dead ends: 67 [2020-10-09 11:04:53,558 INFO L226 Difference]: Without dead ends: 61 [2020-10-09 11:04:53,558 INFO L673 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 [2020-10-09 11:04:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-09 11:04:53,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-09 11:04:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-09 11:04:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-09 11:04:53,562 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-09 11:04:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:53,562 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-09 11:04:53,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 11:04:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-09 11:04:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 11:04:53,562 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:53,563 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:53,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:04:53,763 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:53,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:53,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-09 11:04:53,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:53,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132959225] [2020-10-09 11:04:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:53,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132959225] [2020-10-09 11:04:53,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432930212] [2020-10-09 11:04:53,822 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 [2020-10-09 11:04:53,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 11:04:53,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:53,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 11:04:53,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:53,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:04:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:53,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:53,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-09 11:04:53,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728041729] [2020-10-09 11:04:53,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 11:04:53,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:53,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 11:04:53,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-09 11:04:53,886 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-09 11:04:54,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:54,088 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-09 11:04:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 11:04:54,090 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-09 11:04:54,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:54,090 INFO L225 Difference]: With dead ends: 69 [2020-10-09 11:04:54,091 INFO L226 Difference]: Without dead ends: 63 [2020-10-09 11:04:54,091 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:04:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-09 11:04:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-09 11:04:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-09 11:04:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-09 11:04:54,094 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-09 11:04:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:54,094 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-09 11:04:54,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 11:04:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-09 11:04:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 11:04:54,097 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:54,098 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:54,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:04:54,308 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:54,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:54,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-09 11:04:54,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:54,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735002581] [2020-10-09 11:04:54,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:54,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735002581] [2020-10-09 11:04:54,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709685738] [2020-10-09 11:04:54,368 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 [2020-10-09 11:04:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:54,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 11:04:54,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:54,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:54,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-09 11:04:54,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706902574] [2020-10-09 11:04:54,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 11:04:54,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:54,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 11:04:54,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-09 11:04:54,420 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-09 11:04:54,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:54,613 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-09 11:04:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 11:04:54,616 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-09 11:04:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:54,616 INFO L225 Difference]: With dead ends: 88 [2020-10-09 11:04:54,617 INFO L226 Difference]: Without dead ends: 82 [2020-10-09 11:04:54,617 INFO L673 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 [2020-10-09 11:04:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-09 11:04:54,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-09 11:04:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-09 11:04:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-09 11:04:54,621 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-09 11:04:54,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:54,621 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-09 11:04:54,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 11:04:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-09 11:04:54,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 11:04:54,622 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:54,622 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:54,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:04:54,827 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:54,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:54,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-09 11:04:54,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:54,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670253351] [2020-10-09 11:04:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:54,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670253351] [2020-10-09 11:04:54,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386827595] [2020-10-09 11:04:54,903 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 [2020-10-09 11:04:54,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:04:54,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:54,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 11:04:54,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:54,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:04:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:54,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:54,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-09 11:04:54,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615220344] [2020-10-09 11:04:54,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 11:04:54,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:54,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 11:04:54,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 11:04:54,981 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-09 11:04:55,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:55,246 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-09 11:04:55,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 11:04:55,246 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-09 11:04:55,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:55,247 INFO L225 Difference]: With dead ends: 69 [2020-10-09 11:04:55,247 INFO L226 Difference]: Without dead ends: 61 [2020-10-09 11:04:55,248 INFO L673 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 [2020-10-09 11:04:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-09 11:04:55,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-09 11:04:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-09 11:04:55,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-09 11:04:55,251 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-09 11:04:55,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:55,251 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-09 11:04:55,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 11:04:55,252 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-09 11:04:55,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 11:04:55,252 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:55,252 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:55,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-09 11:04:55,455 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:55,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-09 11:04:55,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:55,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98909598] [2020-10-09 11:04:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:55,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98909598] [2020-10-09 11:04:55,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747488523] [2020-10-09 11:04:55,554 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 [2020-10-09 11:04:55,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 11:04:55,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:55,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 11:04:55,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:55,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:55,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-09 11:04:55,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362389609] [2020-10-09 11:04:55,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 11:04:55,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:55,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 11:04:55,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 11:04:55,632 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-09 11:04:55,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:55,752 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-09 11:04:55,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 11:04:55,753 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-09 11:04:55,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:55,754 INFO L225 Difference]: With dead ends: 74 [2020-10-09 11:04:55,754 INFO L226 Difference]: Without dead ends: 68 [2020-10-09 11:04:55,754 INFO L673 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 [2020-10-09 11:04:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-09 11:04:55,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-09 11:04:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-09 11:04:55,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-09 11:04:55,757 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-09 11:04:55,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:55,757 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-09 11:04:55,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 11:04:55,758 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-09 11:04:55,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 11:04:55,758 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:55,758 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:55,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-09 11:04:55,968 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:55,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:55,969 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-09 11:04:55,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:55,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385495625] [2020-10-09 11:04:55,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:56,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385495625] [2020-10-09 11:04:56,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578020093] [2020-10-09 11:04:56,041 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 [2020-10-09 11:04:56,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:04:56,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:56,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 11:04:56,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:56,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:04:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:56,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:56,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-09 11:04:56,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103971815] [2020-10-09 11:04:56,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 11:04:56,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:56,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 11:04:56,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-09 11:04:56,118 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-09 11:04:56,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:56,305 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-09 11:04:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 11:04:56,305 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-09 11:04:56,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:56,306 INFO L225 Difference]: With dead ends: 71 [2020-10-09 11:04:56,306 INFO L226 Difference]: Without dead ends: 65 [2020-10-09 11:04:56,306 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:04:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-09 11:04:56,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-09 11:04:56,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-09 11:04:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-09 11:04:56,309 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-09 11:04:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:56,309 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-09 11:04:56,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 11:04:56,309 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-09 11:04:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 11:04:56,310 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:56,310 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:56,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-09 11:04:56,517 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:56,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:56,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-09 11:04:56,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:56,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705292805] [2020-10-09 11:04:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:56,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705292805] [2020-10-09 11:04:56,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031777369] [2020-10-09 11:04:56,580 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 [2020-10-09 11:04:56,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 11:04:56,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:56,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 11:04:56,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:56,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:56,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-09 11:04:56,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792755143] [2020-10-09 11:04:56,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 11:04:56,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:56,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 11:04:56,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-09 11:04:56,637 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-09 11:04:56,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:56,810 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-09 11:04:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 11:04:56,811 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-09 11:04:56,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:56,812 INFO L225 Difference]: With dead ends: 68 [2020-10-09 11:04:56,812 INFO L226 Difference]: Without dead ends: 62 [2020-10-09 11:04:56,813 INFO L673 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 [2020-10-09 11:04:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-09 11:04:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-09 11:04:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-09 11:04:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-09 11:04:56,816 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-09 11:04:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:56,816 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-09 11:04:56,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 11:04:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-09 11:04:56,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 11:04:56,817 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:56,817 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:57,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-09 11:04:57,026 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:57,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:57,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-09 11:04:57,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:57,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034780028] [2020-10-09 11:04:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:57,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034780028] [2020-10-09 11:04:57,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246521301] [2020-10-09 11:04:57,100 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 [2020-10-09 11:04:57,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 11:04:57,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:57,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 11:04:57,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:57,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:04:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:57,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:57,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-09 11:04:57,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496745612] [2020-10-09 11:04:57,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 11:04:57,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:57,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 11:04:57,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-09 11:04:57,187 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-09 11:04:57,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:57,439 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-09 11:04:57,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 11:04:57,439 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-09 11:04:57,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:57,440 INFO L225 Difference]: With dead ends: 67 [2020-10-09 11:04:57,440 INFO L226 Difference]: Without dead ends: 61 [2020-10-09 11:04:57,441 INFO L673 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 [2020-10-09 11:04:57,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-09 11:04:57,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-09 11:04:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-09 11:04:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-09 11:04:57,444 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-09 11:04:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:57,444 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-09 11:04:57,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 11:04:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-09 11:04:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 11:04:57,445 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:57,445 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:57,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-09 11:04:57,645 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:57,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:57,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-09 11:04:57,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:57,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277239589] [2020-10-09 11:04:57,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:57,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277239589] [2020-10-09 11:04:57,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581695215] [2020-10-09 11:04:57,705 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 [2020-10-09 11:04:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:57,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 11:04:57,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:57,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:57,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-09 11:04:57,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533908810] [2020-10-09 11:04:57,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 11:04:57,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:57,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 11:04:57,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 11:04:57,760 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-09 11:04:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:57,986 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-09 11:04:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 11:04:57,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-09 11:04:57,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:57,988 INFO L225 Difference]: With dead ends: 83 [2020-10-09 11:04:57,988 INFO L226 Difference]: Without dead ends: 77 [2020-10-09 11:04:57,988 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:04:57,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-09 11:04:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-09 11:04:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-09 11:04:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-09 11:04:57,992 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-09 11:04:57,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:57,992 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-09 11:04:57,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 11:04:57,992 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-09 11:04:57,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 11:04:57,993 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:57,993 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:58,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:04:58,201 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:58,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-09 11:04:58,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:58,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468878280] [2020-10-09 11:04:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:58,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468878280] [2020-10-09 11:04:58,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615941890] [2020-10-09 11:04:58,257 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 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 [2020-10-09 11:04:58,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:04:58,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:58,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 11:04:58,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:58,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:58,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-09 11:04:58,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786760322] [2020-10-09 11:04:58,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 11:04:58,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:58,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 11:04:58,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-09 11:04:58,339 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-09 11:04:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:58,604 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-09 11:04:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 11:04:58,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-09 11:04:58,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:58,605 INFO L225 Difference]: With dead ends: 62 [2020-10-09 11:04:58,605 INFO L226 Difference]: Without dead ends: 54 [2020-10-09 11:04:58,605 INFO L673 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 [2020-10-09 11:04:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-09 11:04:58,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-09 11:04:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-09 11:04:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-09 11:04:58,607 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-09 11:04:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:58,608 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-09 11:04:58,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 11:04:58,608 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-09 11:04:58,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 11:04:58,608 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:58,608 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:58,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-09 11:04:58,816 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:58,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:58,816 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-09 11:04:58,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:58,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354534919] [2020-10-09 11:04:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:58,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354534919] [2020-10-09 11:04:58,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603781613] [2020-10-09 11:04:58,872 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 [2020-10-09 11:04:58,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 11:04:58,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:58,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 11:04:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:58,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:04:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:58,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:58,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-09 11:04:58,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527405999] [2020-10-09 11:04:58,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 11:04:58,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:58,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 11:04:58,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-09 11:04:58,938 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-09 11:04:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:59,204 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-09 11:04:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 11:04:59,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-09 11:04:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:59,205 INFO L225 Difference]: With dead ends: 68 [2020-10-09 11:04:59,206 INFO L226 Difference]: Without dead ends: 63 [2020-10-09 11:04:59,206 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:04:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-09 11:04:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-09 11:04:59,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-09 11:04:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-09 11:04:59,208 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-09 11:04:59,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:59,209 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-09 11:04:59,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 11:04:59,209 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-09 11:04:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 11:04:59,209 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:59,209 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:04:59,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-09 11:04:59,410 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:04:59,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:04:59,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-09 11:04:59,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:04:59,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429164978] [2020-10-09 11:04:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:04:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:04:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:59,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429164978] [2020-10-09 11:04:59,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563781499] [2020-10-09 11:04:59,482 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 [2020-10-09 11:04:59,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:04:59,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:04:59,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 11:04:59,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:04:59,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:04:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:04:59,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:04:59,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-09 11:04:59,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024810559] [2020-10-09 11:04:59,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 11:04:59,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:04:59,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 11:04:59,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-09 11:04:59,556 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-09 11:04:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:04:59,840 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-09 11:04:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 11:04:59,842 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-09 11:04:59,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:04:59,843 INFO L225 Difference]: With dead ends: 60 [2020-10-09 11:04:59,843 INFO L226 Difference]: Without dead ends: 55 [2020-10-09 11:04:59,844 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:04:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-09 11:04:59,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-09 11:04:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-09 11:04:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-09 11:04:59,847 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-09 11:04:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:04:59,847 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-09 11:04:59,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 11:04:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-09 11:04:59,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 11:04:59,848 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:04:59,848 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:00,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:00,049 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:00,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-09 11:05:00,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:00,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895073246] [2020-10-09 11:05:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:00,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895073246] [2020-10-09 11:05:00,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307646885] [2020-10-09 11:05:00,133 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 [2020-10-09 11:05:00,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-09 11:05:00,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:00,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 11:05:00,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:00,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:00,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-09 11:05:00,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288976065] [2020-10-09 11:05:00,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 11:05:00,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:00,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 11:05:00,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-09 11:05:00,196 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-09 11:05:00,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:00,403 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-09 11:05:00,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 11:05:00,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-09 11:05:00,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:00,405 INFO L225 Difference]: With dead ends: 66 [2020-10-09 11:05:00,405 INFO L226 Difference]: Without dead ends: 60 [2020-10-09 11:05:00,406 INFO L673 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 [2020-10-09 11:05:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-09 11:05:00,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-09 11:05:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-09 11:05:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-09 11:05:00,409 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-09 11:05:00,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:00,410 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-09 11:05:00,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 11:05:00,410 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-09 11:05:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 11:05:00,415 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:00,415 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:00,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:00,617 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:00,618 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-09 11:05:00,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:00,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628331999] [2020-10-09 11:05:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:00,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628331999] [2020-10-09 11:05:00,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370556490] [2020-10-09 11:05:00,764 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 [2020-10-09 11:05:00,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 11:05:00,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:00,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 11:05:00,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:00,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:00,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:00,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-09 11:05:00,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109707127] [2020-10-09 11:05:00,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 11:05:00,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:00,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 11:05:00,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-09 11:05:00,880 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-09 11:05:01,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:01,090 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-09 11:05:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 11:05:01,090 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-09 11:05:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:01,091 INFO L225 Difference]: With dead ends: 74 [2020-10-09 11:05:01,091 INFO L226 Difference]: Without dead ends: 68 [2020-10-09 11:05:01,091 INFO L673 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 [2020-10-09 11:05:01,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-09 11:05:01,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-09 11:05:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-09 11:05:01,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-09 11:05:01,094 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-09 11:05:01,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:01,095 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-09 11:05:01,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 11:05:01,095 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-09 11:05:01,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 11:05:01,095 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:01,095 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:01,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-09 11:05:01,305 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:01,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:01,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-09 11:05:01,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:01,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794664759] [2020-10-09 11:05:01,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:01,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794664759] [2020-10-09 11:05:01,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938646211] [2020-10-09 11:05:01,382 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 [2020-10-09 11:05:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:01,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 11:05:01,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:01,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:01,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-09 11:05:01,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759926106] [2020-10-09 11:05:01,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 11:05:01,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:01,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 11:05:01,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-09 11:05:01,449 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-09 11:05:01,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:01,647 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-09 11:05:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 11:05:01,647 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-09 11:05:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:01,648 INFO L225 Difference]: With dead ends: 75 [2020-10-09 11:05:01,648 INFO L226 Difference]: Without dead ends: 69 [2020-10-09 11:05:01,649 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:05:01,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-09 11:05:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-09 11:05:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-09 11:05:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-09 11:05:01,652 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-09 11:05:01,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:01,652 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-09 11:05:01,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 11:05:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-09 11:05:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 11:05:01,653 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:01,653 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:01,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:01,862 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:01,862 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-09 11:05:01,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:01,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723549605] [2020-10-09 11:05:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:01,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:01,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723549605] [2020-10-09 11:05:01,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32287262] [2020-10-09 11:05:01,940 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 [2020-10-09 11:05:01,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:05:01,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:01,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 11:05:01,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:01,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:02,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:02,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-09 11:05:02,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777424266] [2020-10-09 11:05:02,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 11:05:02,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:02,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 11:05:02,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-09 11:05:02,009 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-09 11:05:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:02,252 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-09 11:05:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 11:05:02,253 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-09 11:05:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:02,253 INFO L225 Difference]: With dead ends: 79 [2020-10-09 11:05:02,253 INFO L226 Difference]: Without dead ends: 73 [2020-10-09 11:05:02,254 INFO L673 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 [2020-10-09 11:05:02,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-09 11:05:02,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-09 11:05:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-09 11:05:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-09 11:05:02,256 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-09 11:05:02,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:02,257 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-09 11:05:02,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 11:05:02,257 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-09 11:05:02,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 11:05:02,257 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:02,257 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:02,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-09 11:05:02,458 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:02,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:02,459 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-09 11:05:02,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:02,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643174938] [2020-10-09 11:05:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:02,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643174938] [2020-10-09 11:05:02,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712443625] [2020-10-09 11:05:02,554 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 [2020-10-09 11:05:02,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 11:05:02,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:02,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 11:05:02,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:02,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:02,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-09 11:05:02,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898294147] [2020-10-09 11:05:02,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 11:05:02,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:02,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 11:05:02,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-09 11:05:02,636 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-09 11:05:02,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:02,897 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-09 11:05:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 11:05:02,898 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-09 11:05:02,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:02,899 INFO L225 Difference]: With dead ends: 79 [2020-10-09 11:05:02,899 INFO L226 Difference]: Without dead ends: 73 [2020-10-09 11:05:02,899 INFO L673 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 [2020-10-09 11:05:02,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-09 11:05:02,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-09 11:05:02,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-09 11:05:02,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-09 11:05:02,902 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-09 11:05:02,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:02,902 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-09 11:05:02,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 11:05:02,902 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-09 11:05:02,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 11:05:02,902 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:02,903 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:03,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:03,111 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:03,112 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-09 11:05:03,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:03,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617799750] [2020-10-09 11:05:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:03,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617799750] [2020-10-09 11:05:03,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674619812] [2020-10-09 11:05:03,206 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 [2020-10-09 11:05:03,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:05:03,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:03,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 11:05:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:03,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:03,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:03,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-09 11:05:03,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078225607] [2020-10-09 11:05:03,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 11:05:03,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:03,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 11:05:03,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-09 11:05:03,347 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-09 11:05:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:03,749 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-09 11:05:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 11:05:03,750 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-09 11:05:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:03,751 INFO L225 Difference]: With dead ends: 76 [2020-10-09 11:05:03,751 INFO L226 Difference]: Without dead ends: 70 [2020-10-09 11:05:03,752 INFO L673 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 [2020-10-09 11:05:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-09 11:05:03,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-09 11:05:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-09 11:05:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-09 11:05:03,756 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-09 11:05:03,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:03,756 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-09 11:05:03,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 11:05:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-09 11:05:03,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 11:05:03,757 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:03,758 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:03,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-09 11:05:03,970 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:03,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:03,971 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-09 11:05:03,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:03,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716460794] [2020-10-09 11:05:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:04,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716460794] [2020-10-09 11:05:04,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750049906] [2020-10-09 11:05:04,063 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 [2020-10-09 11:05:04,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-09 11:05:04,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:04,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 11:05:04,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:04,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:04,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-09 11:05:04,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24247611] [2020-10-09 11:05:04,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 11:05:04,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:04,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 11:05:04,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-09 11:05:04,140 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-09 11:05:04,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:04,382 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-09 11:05:04,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 11:05:04,382 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-09 11:05:04,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:04,383 INFO L225 Difference]: With dead ends: 96 [2020-10-09 11:05:04,383 INFO L226 Difference]: Without dead ends: 90 [2020-10-09 11:05:04,384 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:05:04,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-09 11:05:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-09 11:05:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-09 11:05:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-09 11:05:04,386 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-09 11:05:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:04,387 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-09 11:05:04,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 11:05:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-09 11:05:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 11:05:04,387 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:04,387 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:04,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-09 11:05:04,594 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:04,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:04,595 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-09 11:05:04,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:04,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825165804] [2020-10-09 11:05:04,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:04,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825165804] [2020-10-09 11:05:04,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790904370] [2020-10-09 11:05:04,659 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 [2020-10-09 11:05:04,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 11:05:04,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:04,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 11:05:04,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:04,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:04,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:04,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-09 11:05:04,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834957063] [2020-10-09 11:05:04,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 11:05:04,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:04,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 11:05:04,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-09 11:05:04,757 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-09 11:05:05,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:05,170 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-09 11:05:05,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 11:05:05,170 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-09 11:05:05,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:05,171 INFO L225 Difference]: With dead ends: 77 [2020-10-09 11:05:05,172 INFO L226 Difference]: Without dead ends: 69 [2020-10-09 11:05:05,172 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:05:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-09 11:05:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-09 11:05:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-09 11:05:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-09 11:05:05,176 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-09 11:05:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:05,176 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-09 11:05:05,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 11:05:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-09 11:05:05,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-09 11:05:05,177 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:05,178 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:05,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-09 11:05:05,387 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:05,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:05,388 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-09 11:05:05,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:05,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343666039] [2020-10-09 11:05:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:05,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343666039] [2020-10-09 11:05:05,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119760175] [2020-10-09 11:05:05,520 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 [2020-10-09 11:05:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:05,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 11:05:05,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:05,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:05,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-09 11:05:05,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784401468] [2020-10-09 11:05:05,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 11:05:05,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:05,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 11:05:05,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-09 11:05:05,611 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-09 11:05:05,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:05,840 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-09 11:05:05,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 11:05:05,840 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-09 11:05:05,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:05,842 INFO L225 Difference]: With dead ends: 84 [2020-10-09 11:05:05,842 INFO L226 Difference]: Without dead ends: 78 [2020-10-09 11:05:05,842 INFO L673 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 [2020-10-09 11:05:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-09 11:05:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-09 11:05:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-09 11:05:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-09 11:05:05,846 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-09 11:05:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:05,846 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-09 11:05:05,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 11:05:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-09 11:05:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-09 11:05:05,847 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:05,848 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:06,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-09 11:05:06,059 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:06,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:06,060 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-09 11:05:06,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:06,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257749479] [2020-10-09 11:05:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:06,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257749479] [2020-10-09 11:05:06,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862543747] [2020-10-09 11:05:06,166 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 [2020-10-09 11:05:06,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:05:06,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:06,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 11:05:06,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:06,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:06,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:06,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-09 11:05:06,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669918421] [2020-10-09 11:05:06,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 11:05:06,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:06,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 11:05:06,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-09 11:05:06,253 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-09 11:05:06,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:06,506 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-09 11:05:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 11:05:06,506 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-09 11:05:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:06,507 INFO L225 Difference]: With dead ends: 81 [2020-10-09 11:05:06,507 INFO L226 Difference]: Without dead ends: 75 [2020-10-09 11:05:06,507 INFO L673 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 [2020-10-09 11:05:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-09 11:05:06,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-09 11:05:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-09 11:05:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-09 11:05:06,510 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-09 11:05:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:06,510 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-09 11:05:06,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 11:05:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-09 11:05:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-09 11:05:06,511 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:06,511 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:06,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-09 11:05:06,711 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:06,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:06,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-09 11:05:06,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:06,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782798713] [2020-10-09 11:05:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:06,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782798713] [2020-10-09 11:05:06,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687035497] [2020-10-09 11:05:06,794 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 [2020-10-09 11:05:06,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 11:05:06,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:06,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 11:05:06,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:06,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:06,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-09 11:05:06,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242570509] [2020-10-09 11:05:06,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 11:05:06,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:06,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 11:05:06,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-09 11:05:06,860 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-09 11:05:07,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:07,076 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-09 11:05:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 11:05:07,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-09 11:05:07,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:07,077 INFO L225 Difference]: With dead ends: 78 [2020-10-09 11:05:07,077 INFO L226 Difference]: Without dead ends: 72 [2020-10-09 11:05:07,078 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:05:07,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-09 11:05:07,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-09 11:05:07,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-09 11:05:07,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-09 11:05:07,081 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-09 11:05:07,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:07,081 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-09 11:05:07,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 11:05:07,081 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-09 11:05:07,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-09 11:05:07,082 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:07,082 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:07,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-09 11:05:07,285 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:07,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:07,285 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-09 11:05:07,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:07,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545574289] [2020-10-09 11:05:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:07,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545574289] [2020-10-09 11:05:07,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305087419] [2020-10-09 11:05:07,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:05:07,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:05:07,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:07,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 11:05:07,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:07,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:07,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:07,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-09 11:05:07,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818975868] [2020-10-09 11:05:07,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 11:05:07,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:07,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 11:05:07,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-09 11:05:07,452 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-09 11:05:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:07,760 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-09 11:05:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 11:05:07,760 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-09 11:05:07,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:07,761 INFO L225 Difference]: With dead ends: 77 [2020-10-09 11:05:07,761 INFO L226 Difference]: Without dead ends: 71 [2020-10-09 11:05:07,762 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:05:07,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-09 11:05:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-09 11:05:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-09 11:05:07,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-09 11:05:07,765 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-09 11:05:07,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:07,765 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-09 11:05:07,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 11:05:07,766 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-09 11:05:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-09 11:05:07,766 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:07,766 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:07,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-09 11:05:07,975 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:07,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:07,975 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-09 11:05:07,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:07,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941930390] [2020-10-09 11:05:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:08,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941930390] [2020-10-09 11:05:08,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132726088] [2020-10-09 11:05:08,049 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 [2020-10-09 11:05:08,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-09 11:05:08,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:08,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 11:05:08,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:08,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:08,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-09 11:05:08,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768667925] [2020-10-09 11:05:08,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 11:05:08,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:08,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 11:05:08,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-09 11:05:08,119 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-09 11:05:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:08,386 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-09 11:05:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 11:05:08,387 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-09 11:05:08,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:08,388 INFO L225 Difference]: With dead ends: 74 [2020-10-09 11:05:08,388 INFO L226 Difference]: Without dead ends: 68 [2020-10-09 11:05:08,388 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:05:08,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-09 11:05:08,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-09 11:05:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-09 11:05:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-09 11:05:08,391 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-09 11:05:08,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:08,391 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-09 11:05:08,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 11:05:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-09 11:05:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-09 11:05:08,392 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:08,392 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:08,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:08,602 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:08,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:08,602 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-09 11:05:08,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:08,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352800349] [2020-10-09 11:05:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:08,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352800349] [2020-10-09 11:05:08,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052863828] [2020-10-09 11:05:08,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:05:08,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 11:05:08,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:08,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 11:05:08,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:08,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:08,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:08,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-09 11:05:08,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26568118] [2020-10-09 11:05:08,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 11:05:08,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 11:05:08,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-09 11:05:08,760 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-09 11:05:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:09,145 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-09 11:05:09,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 11:05:09,149 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-09 11:05:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:09,150 INFO L225 Difference]: With dead ends: 73 [2020-10-09 11:05:09,150 INFO L226 Difference]: Without dead ends: 67 [2020-10-09 11:05:09,151 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:05:09,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-09 11:05:09,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-09 11:05:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-09 11:05:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-09 11:05:09,153 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-09 11:05:09,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:09,154 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-09 11:05:09,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 11:05:09,154 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-09 11:05:09,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-09 11:05:09,154 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:09,154 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:09,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-09 11:05:09,362 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:09,363 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-09 11:05:09,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:09,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939662645] [2020-10-09 11:05:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:09,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939662645] [2020-10-09 11:05:09,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303355469] [2020-10-09 11:05:09,432 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 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 [2020-10-09 11:05:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:09,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 11:05:09,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:09,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:09,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-09 11:05:09,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325816066] [2020-10-09 11:05:09,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 11:05:09,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:09,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 11:05:09,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-09 11:05:09,497 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-09 11:05:09,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:09,783 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-09 11:05:09,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 11:05:09,783 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-09 11:05:09,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:09,787 INFO L225 Difference]: With dead ends: 89 [2020-10-09 11:05:09,787 INFO L226 Difference]: Without dead ends: 83 [2020-10-09 11:05:09,788 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:05:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-09 11:05:09,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-09 11:05:09,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-09 11:05:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-09 11:05:09,792 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-09 11:05:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:09,792 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-09 11:05:09,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 11:05:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-09 11:05:09,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-09 11:05:09,793 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:09,793 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:09,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:09,998 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:09,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:09,998 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-09 11:05:09,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:09,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304728260] [2020-10-09 11:05:09,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:10,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304728260] [2020-10-09 11:05:10,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796458219] [2020-10-09 11:05:10,066 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 [2020-10-09 11:05:10,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:05:10,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:10,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 11:05:10,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:10,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:10,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-09 11:05:10,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161664951] [2020-10-09 11:05:10,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 11:05:10,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:10,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 11:05:10,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-09 11:05:10,163 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-09 11:05:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:10,513 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-09 11:05:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 11:05:10,513 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-09 11:05:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:10,514 INFO L225 Difference]: With dead ends: 68 [2020-10-09 11:05:10,514 INFO L226 Difference]: Without dead ends: 60 [2020-10-09 11:05:10,515 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:05:10,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-09 11:05:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-09 11:05:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-09 11:05:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-09 11:05:10,522 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-09 11:05:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:10,523 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-09 11:05:10,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 11:05:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-09 11:05:10,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-09 11:05:10,524 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:10,524 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:10,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-09 11:05:10,734 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:10,734 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-09 11:05:10,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:10,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661066508] [2020-10-09 11:05:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:10,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661066508] [2020-10-09 11:05:10,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144400454] [2020-10-09 11:05:10,806 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 [2020-10-09 11:05:10,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 11:05:10,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:10,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 11:05:10,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:10,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:05:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:10,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:10,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-09 11:05:10,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418704865] [2020-10-09 11:05:10,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 11:05:10,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:10,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 11:05:10,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-09 11:05:10,924 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-09 11:05:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:11,299 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-09 11:05:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 11:05:11,299 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-09 11:05:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:11,300 INFO L225 Difference]: With dead ends: 76 [2020-10-09 11:05:11,300 INFO L226 Difference]: Without dead ends: 71 [2020-10-09 11:05:11,301 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:05:11,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-09 11:05:11,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-09 11:05:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-09 11:05:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-09 11:05:11,303 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-09 11:05:11,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:11,304 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-09 11:05:11,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 11:05:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-09 11:05:11,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-09 11:05:11,304 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:11,305 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:11,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:11,512 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:11,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:11,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-09 11:05:11,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:11,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816359274] [2020-10-09 11:05:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:11,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816359274] [2020-10-09 11:05:11,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762583495] [2020-10-09 11:05:11,602 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 [2020-10-09 11:05:11,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:05:11,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:11,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 11:05:11,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:11,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:05:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:11,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:11,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-09 11:05:11,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242674627] [2020-10-09 11:05:11,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 11:05:11,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:11,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 11:05:11,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-09 11:05:11,700 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-09 11:05:12,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:12,113 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-09 11:05:12,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 11:05:12,114 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-09 11:05:12,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:12,115 INFO L225 Difference]: With dead ends: 66 [2020-10-09 11:05:12,115 INFO L226 Difference]: Without dead ends: 61 [2020-10-09 11:05:12,115 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-09 11:05:12,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-09 11:05:12,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-09 11:05:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-09 11:05:12,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-09 11:05:12,118 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-09 11:05:12,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:12,118 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-09 11:05:12,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 11:05:12,118 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-09 11:05:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-09 11:05:12,119 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:12,119 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:12,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-09 11:05:12,328 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:12,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:12,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-09 11:05:12,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:12,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753934752] [2020-10-09 11:05:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:12,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753934752] [2020-10-09 11:05:12,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340429130] [2020-10-09 11:05:12,439 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 [2020-10-09 11:05:12,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-09 11:05:12,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:12,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 11:05:12,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:12,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:12,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-09 11:05:12,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561856461] [2020-10-09 11:05:12,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 11:05:12,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:12,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 11:05:12,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 11:05:12,497 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-09 11:05:12,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:12,688 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-09 11:05:12,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 11:05:12,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-09 11:05:12,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:12,689 INFO L225 Difference]: With dead ends: 72 [2020-10-09 11:05:12,689 INFO L226 Difference]: Without dead ends: 66 [2020-10-09 11:05:12,690 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:05:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-09 11:05:12,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-09 11:05:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-09 11:05:12,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-09 11:05:12,693 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-09 11:05:12,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:12,694 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-09 11:05:12,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 11:05:12,694 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-09 11:05:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-09 11:05:12,695 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:12,695 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:12,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-09 11:05:12,903 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:12,904 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-09 11:05:12,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:12,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067478729] [2020-10-09 11:05:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:13,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067478729] [2020-10-09 11:05:13,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506705816] [2020-10-09 11:05:13,011 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 [2020-10-09 11:05:13,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-09 11:05:13,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:13,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 11:05:13,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:13,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:13,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:13,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-09 11:05:13,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135386212] [2020-10-09 11:05:13,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 11:05:13,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:13,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 11:05:13,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-09 11:05:13,088 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-09 11:05:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:13,280 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-09 11:05:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 11:05:13,281 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-09 11:05:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:13,281 INFO L225 Difference]: With dead ends: 82 [2020-10-09 11:05:13,281 INFO L226 Difference]: Without dead ends: 76 [2020-10-09 11:05:13,282 INFO L673 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 [2020-10-09 11:05:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-09 11:05:13,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-09 11:05:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-09 11:05:13,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-09 11:05:13,284 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-09 11:05:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:13,285 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-09 11:05:13,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 11:05:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-09 11:05:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-09 11:05:13,285 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:13,285 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:13,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-09 11:05:13,486 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:13,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:13,487 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-09 11:05:13,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:13,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104852606] [2020-10-09 11:05:13,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:13,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104852606] [2020-10-09 11:05:13,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588566769] [2020-10-09 11:05:13,588 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 [2020-10-09 11:05:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:13,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 11:05:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:13,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:13,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-09 11:05:13,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020181703] [2020-10-09 11:05:13,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 11:05:13,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 11:05:13,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-09 11:05:13,649 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-09 11:05:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:13,887 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-09 11:05:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 11:05:13,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-09 11:05:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:13,888 INFO L225 Difference]: With dead ends: 83 [2020-10-09 11:05:13,889 INFO L226 Difference]: Without dead ends: 77 [2020-10-09 11:05:13,889 INFO L673 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 [2020-10-09 11:05:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-09 11:05:13,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-09 11:05:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-09 11:05:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-09 11:05:13,892 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-09 11:05:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:13,892 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-09 11:05:13,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 11:05:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-09 11:05:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-09 11:05:13,893 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:13,893 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:14,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-09 11:05:14,101 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:14,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:14,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-09 11:05:14,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:14,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511421887] [2020-10-09 11:05:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:14,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511421887] [2020-10-09 11:05:14,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47715375] [2020-10-09 11:05:14,222 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 [2020-10-09 11:05:14,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:05:14,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:14,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 11:05:14,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:14,311 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:14,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:14,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-09 11:05:14,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099992747] [2020-10-09 11:05:14,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 11:05:14,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:14,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 11:05:14,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-09 11:05:14,325 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-09 11:05:14,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:14,614 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-09 11:05:14,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 11:05:14,614 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-09 11:05:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:14,615 INFO L225 Difference]: With dead ends: 89 [2020-10-09 11:05:14,615 INFO L226 Difference]: Without dead ends: 83 [2020-10-09 11:05:14,616 INFO L673 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 [2020-10-09 11:05:14,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-09 11:05:14,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-09 11:05:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-09 11:05:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-09 11:05:14,619 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-09 11:05:14,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:14,619 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-09 11:05:14,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 11:05:14,619 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-09 11:05:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-09 11:05:14,620 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:14,620 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:14,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:14,829 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-09 11:05:14,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:14,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499801994] [2020-10-09 11:05:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:14,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:14,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499801994] [2020-10-09 11:05:14,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108778348] [2020-10-09 11:05:14,916 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 [2020-10-09 11:05:14,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-09 11:05:14,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:14,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 11:05:14,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:14,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:14,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-09 11:05:14,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319870983] [2020-10-09 11:05:14,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 11:05:14,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:14,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 11:05:14,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-09 11:05:14,990 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-09 11:05:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:15,263 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-09 11:05:15,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 11:05:15,264 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-09 11:05:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:15,264 INFO L225 Difference]: With dead ends: 89 [2020-10-09 11:05:15,265 INFO L226 Difference]: Without dead ends: 83 [2020-10-09 11:05:15,265 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:05:15,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-09 11:05:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-09 11:05:15,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-09 11:05:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-09 11:05:15,267 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-09 11:05:15,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:15,267 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-09 11:05:15,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 11:05:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-09 11:05:15,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-09 11:05:15,268 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:15,268 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:15,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:15,469 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:15,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-09 11:05:15,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:15,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751168100] [2020-10-09 11:05:15,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:15,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751168100] [2020-10-09 11:05:15,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638664696] [2020-10-09 11:05:15,591 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 [2020-10-09 11:05:15,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:05:15,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:15,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 11:05:15,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:15,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:15,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:15,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-09 11:05:15,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007505007] [2020-10-09 11:05:15,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 11:05:15,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:15,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 11:05:15,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-09 11:05:15,704 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-09 11:05:16,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:16,160 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-09 11:05:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 11:05:16,160 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-09 11:05:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:16,161 INFO L225 Difference]: With dead ends: 86 [2020-10-09 11:05:16,161 INFO L226 Difference]: Without dead ends: 80 [2020-10-09 11:05:16,161 INFO L673 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 [2020-10-09 11:05:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-09 11:05:16,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-09 11:05:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-09 11:05:16,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-09 11:05:16,163 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-09 11:05:16,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:16,164 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-09 11:05:16,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 11:05:16,164 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-09 11:05:16,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-09 11:05:16,164 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:16,164 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:16,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-09 11:05:16,370 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:16,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:16,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-09 11:05:16,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:16,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271230589] [2020-10-09 11:05:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:16,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271230589] [2020-10-09 11:05:16,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640151386] [2020-10-09 11:05:16,455 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 [2020-10-09 11:05:16,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-09 11:05:16,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:16,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 11:05:16,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:16,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:16,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-09 11:05:16,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096942777] [2020-10-09 11:05:16,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 11:05:16,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:16,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 11:05:16,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-09 11:05:16,526 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-09 11:05:16,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:16,835 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-09 11:05:16,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 11:05:16,835 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-09 11:05:16,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:16,836 INFO L225 Difference]: With dead ends: 87 [2020-10-09 11:05:16,836 INFO L226 Difference]: Without dead ends: 81 [2020-10-09 11:05:16,836 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:05:16,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-09 11:05:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-09 11:05:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-09 11:05:16,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-09 11:05:16,838 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-09 11:05:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:16,838 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-09 11:05:16,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 11:05:16,838 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-09 11:05:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-09 11:05:16,839 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:16,839 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:17,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:17,040 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:17,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:17,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-09 11:05:17,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:17,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197959784] [2020-10-09 11:05:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:17,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197959784] [2020-10-09 11:05:17,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109581040] [2020-10-09 11:05:17,125 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 [2020-10-09 11:05:17,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-09 11:05:17,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:17,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 11:05:17,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:17,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:17,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:17,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-09 11:05:17,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159292322] [2020-10-09 11:05:17,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 11:05:17,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:17,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 11:05:17,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-09 11:05:17,206 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-09 11:05:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:17,629 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-09 11:05:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 11:05:17,630 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-09 11:05:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:17,631 INFO L225 Difference]: With dead ends: 84 [2020-10-09 11:05:17,631 INFO L226 Difference]: Without dead ends: 78 [2020-10-09 11:05:17,632 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-09 11:05:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-09 11:05:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-09 11:05:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-09 11:05:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-09 11:05:17,634 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-09 11:05:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:17,635 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-09 11:05:17,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 11:05:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-09 11:05:17,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-09 11:05:17,635 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:17,636 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:17,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-09 11:05:17,844 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:17,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-09 11:05:17,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:17,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71116709] [2020-10-09 11:05:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:17,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71116709] [2020-10-09 11:05:17,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816379467] [2020-10-09 11:05:17,932 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 [2020-10-09 11:05:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:17,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 11:05:17,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:18,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:18,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-09 11:05:18,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672242755] [2020-10-09 11:05:18,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 11:05:18,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:18,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 11:05:18,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-09 11:05:18,002 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-09 11:05:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:18,375 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-09 11:05:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 11:05:18,378 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-09 11:05:18,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:18,379 INFO L225 Difference]: With dead ends: 104 [2020-10-09 11:05:18,379 INFO L226 Difference]: Without dead ends: 98 [2020-10-09 11:05:18,380 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-09 11:05:18,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-09 11:05:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-09 11:05:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-09 11:05:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-09 11:05:18,383 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-09 11:05:18,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:18,383 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-09 11:05:18,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 11:05:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-09 11:05:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-09 11:05:18,384 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:18,384 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:18,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-09 11:05:18,593 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:18,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:18,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-09 11:05:18,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:18,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544201096] [2020-10-09 11:05:18,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:18,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544201096] [2020-10-09 11:05:18,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624540763] [2020-10-09 11:05:18,674 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 [2020-10-09 11:05:18,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:05:18,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:18,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 11:05:18,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:18,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:18,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:18,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-09 11:05:18,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028965378] [2020-10-09 11:05:18,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 11:05:18,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:18,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 11:05:18,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-09 11:05:18,750 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-09 11:05:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:19,185 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-09 11:05:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 11:05:19,185 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-09 11:05:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:19,186 INFO L225 Difference]: With dead ends: 85 [2020-10-09 11:05:19,186 INFO L226 Difference]: Without dead ends: 77 [2020-10-09 11:05:19,187 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 11:05:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-09 11:05:19,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-09 11:05:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-09 11:05:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-09 11:05:19,190 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-09 11:05:19,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:19,190 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-09 11:05:19,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 11:05:19,190 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-09 11:05:19,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-09 11:05:19,191 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:19,191 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:19,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-09 11:05:19,396 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:19,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:19,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-09 11:05:19,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:19,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826631913] [2020-10-09 11:05:19,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:19,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826631913] [2020-10-09 11:05:19,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736883883] [2020-10-09 11:05:19,515 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 [2020-10-09 11:05:19,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-09 11:05:19,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:19,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 11:05:19,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:19,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:19,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-09 11:05:19,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610852854] [2020-10-09 11:05:19,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 11:05:19,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:19,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 11:05:19,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-09 11:05:19,573 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-09 11:05:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:19,810 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-09 11:05:19,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 11:05:19,811 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-09 11:05:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:19,812 INFO L225 Difference]: With dead ends: 94 [2020-10-09 11:05:19,812 INFO L226 Difference]: Without dead ends: 88 [2020-10-09 11:05:19,812 INFO L673 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 [2020-10-09 11:05:19,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-09 11:05:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-09 11:05:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-09 11:05:19,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-09 11:05:19,814 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-09 11:05:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:19,814 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-09 11:05:19,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 11:05:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-09 11:05:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-09 11:05:19,815 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:19,815 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:20,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-09 11:05:20,016 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:20,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-09 11:05:20,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:20,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882500014] [2020-10-09 11:05:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:20,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882500014] [2020-10-09 11:05:20,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777283153] [2020-10-09 11:05:20,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:05:20,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:05:20,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:20,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 11:05:20,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:20,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:20,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:20,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-09 11:05:20,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776171087] [2020-10-09 11:05:20,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 11:05:20,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:20,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 11:05:20,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-09 11:05:20,200 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-09 11:05:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:20,495 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-09 11:05:20,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 11:05:20,496 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-09 11:05:20,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:20,497 INFO L225 Difference]: With dead ends: 91 [2020-10-09 11:05:20,497 INFO L226 Difference]: Without dead ends: 85 [2020-10-09 11:05:20,497 INFO L673 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 [2020-10-09 11:05:20,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-09 11:05:20,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-09 11:05:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-09 11:05:20,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-09 11:05:20,500 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-09 11:05:20,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:20,500 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-09 11:05:20,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 11:05:20,501 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-09 11:05:20,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-09 11:05:20,501 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:20,501 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:20,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-09 11:05:20,709 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:20,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:20,709 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-09 11:05:20,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:20,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991569483] [2020-10-09 11:05:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:20,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991569483] [2020-10-09 11:05:20,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996472512] [2020-10-09 11:05:20,811 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 [2020-10-09 11:05:20,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-09 11:05:20,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:20,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 11:05:20,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:20,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:20,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-09 11:05:20,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246694093] [2020-10-09 11:05:20,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 11:05:20,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:20,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 11:05:20,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-09 11:05:20,875 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-09 11:05:21,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:21,136 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-09 11:05:21,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 11:05:21,136 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-09 11:05:21,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:21,137 INFO L225 Difference]: With dead ends: 88 [2020-10-09 11:05:21,137 INFO L226 Difference]: Without dead ends: 82 [2020-10-09 11:05:21,138 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:05:21,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-09 11:05:21,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-09 11:05:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-09 11:05:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-09 11:05:21,141 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-09 11:05:21,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:21,141 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-09 11:05:21,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 11:05:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-09 11:05:21,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-09 11:05:21,142 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:21,142 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:21,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:21,350 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:21,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:21,351 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-09 11:05:21,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:21,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216362449] [2020-10-09 11:05:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:21,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216362449] [2020-10-09 11:05:21,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925468103] [2020-10-09 11:05:21,455 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 [2020-10-09 11:05:21,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-09 11:05:21,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:21,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 11:05:21,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:21,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:21,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:21,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-09 11:05:21,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205744595] [2020-10-09 11:05:21,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 11:05:21,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:21,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 11:05:21,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-09 11:05:21,534 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-09 11:05:21,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:21,886 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-09 11:05:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 11:05:21,887 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-09 11:05:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:21,888 INFO L225 Difference]: With dead ends: 87 [2020-10-09 11:05:21,888 INFO L226 Difference]: Without dead ends: 81 [2020-10-09 11:05:21,888 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:05:21,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-09 11:05:21,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-09 11:05:21,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-09 11:05:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-09 11:05:21,891 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-09 11:05:21,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:21,891 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-09 11:05:21,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 11:05:21,892 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-09 11:05:21,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-09 11:05:21,892 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:21,892 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:22,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:22,098 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:22,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:22,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-09 11:05:22,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:22,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650895985] [2020-10-09 11:05:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:22,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650895985] [2020-10-09 11:05:22,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858268068] [2020-10-09 11:05:22,198 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 [2020-10-09 11:05:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:22,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 11:05:22,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:22,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:22,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-09 11:05:22,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004763050] [2020-10-09 11:05:22,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 11:05:22,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:22,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 11:05:22,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-09 11:05:22,263 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-09 11:05:22,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:22,568 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-09 11:05:22,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 11:05:22,569 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-09 11:05:22,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:22,570 INFO L225 Difference]: With dead ends: 84 [2020-10-09 11:05:22,570 INFO L226 Difference]: Without dead ends: 78 [2020-10-09 11:05:22,570 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:05:22,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-09 11:05:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-09 11:05:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-09 11:05:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-09 11:05:22,573 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-09 11:05:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:22,573 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-09 11:05:22,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 11:05:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-09 11:05:22,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-09 11:05:22,574 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:22,574 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:22,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-09 11:05:22,775 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:22,775 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-09 11:05:22,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:22,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153742985] [2020-10-09 11:05:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:22,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153742985] [2020-10-09 11:05:22,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143193198] [2020-10-09 11:05:22,880 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 [2020-10-09 11:05:22,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:05:22,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:22,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 11:05:22,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:22,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:22,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:22,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-09 11:05:22,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962395488] [2020-10-09 11:05:22,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 11:05:22,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:22,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 11:05:22,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-09 11:05:22,951 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-09 11:05:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:23,376 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-09 11:05:23,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 11:05:23,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-09 11:05:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:23,378 INFO L225 Difference]: With dead ends: 83 [2020-10-09 11:05:23,378 INFO L226 Difference]: Without dead ends: 77 [2020-10-09 11:05:23,379 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-09 11:05:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-09 11:05:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-09 11:05:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-09 11:05:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-09 11:05:23,394 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-09 11:05:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:23,395 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-09 11:05:23,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 11:05:23,395 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-09 11:05:23,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-09 11:05:23,395 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:23,395 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:23,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:23,596 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:23,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:23,597 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-09 11:05:23,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:23,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579061583] [2020-10-09 11:05:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:23,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579061583] [2020-10-09 11:05:23,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786555492] [2020-10-09 11:05:23,696 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 [2020-10-09 11:05:23,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-09 11:05:23,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:23,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 11:05:23,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:23,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:23,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-09 11:05:23,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423704902] [2020-10-09 11:05:23,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 11:05:23,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:23,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 11:05:23,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-09 11:05:23,756 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-09 11:05:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:24,120 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-09 11:05:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 11:05:24,121 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-09 11:05:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:24,122 INFO L225 Difference]: With dead ends: 80 [2020-10-09 11:05:24,122 INFO L226 Difference]: Without dead ends: 74 [2020-10-09 11:05:24,122 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-09 11:05:24,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-09 11:05:24,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-09 11:05:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-09 11:05:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-09 11:05:24,124 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-09 11:05:24,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:24,125 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-09 11:05:24,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 11:05:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-09 11:05:24,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-09 11:05:24,125 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:24,125 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:24,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-09 11:05:24,326 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:24,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:24,326 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-09 11:05:24,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:24,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647033530] [2020-10-09 11:05:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:24,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647033530] [2020-10-09 11:05:24,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013565016] [2020-10-09 11:05:24,419 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 [2020-10-09 11:05:24,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:05:24,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:24,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 11:05:24,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:24,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:24,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:24,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-09 11:05:24,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915834271] [2020-10-09 11:05:24,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 11:05:24,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:24,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 11:05:24,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-09 11:05:24,506 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-09 11:05:25,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:25,022 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-09 11:05:25,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 11:05:25,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-09 11:05:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:25,023 INFO L225 Difference]: With dead ends: 79 [2020-10-09 11:05:25,023 INFO L226 Difference]: Without dead ends: 73 [2020-10-09 11:05:25,024 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 11:05:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-09 11:05:25,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-09 11:05:25,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-09 11:05:25,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-09 11:05:25,026 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-09 11:05:25,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:25,026 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-09 11:05:25,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 11:05:25,027 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-09 11:05:25,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-09 11:05:25,027 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:25,027 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:25,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:25,228 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:25,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:25,228 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-09 11:05:25,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:25,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499974763] [2020-10-09 11:05:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:25,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499974763] [2020-10-09 11:05:25,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139784887] [2020-10-09 11:05:25,322 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 [2020-10-09 11:05:25,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-09 11:05:25,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:25,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 11:05:25,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:25,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:25,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-09 11:05:25,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568122635] [2020-10-09 11:05:25,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 11:05:25,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:25,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 11:05:25,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-09 11:05:25,390 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-09 11:05:25,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:25,784 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-09 11:05:25,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 11:05:25,785 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-09 11:05:25,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:25,786 INFO L225 Difference]: With dead ends: 95 [2020-10-09 11:05:25,786 INFO L226 Difference]: Without dead ends: 89 [2020-10-09 11:05:25,786 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 11:05:25,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-09 11:05:25,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-09 11:05:25,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-09 11:05:25,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-09 11:05:25,790 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-09 11:05:25,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:25,790 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-09 11:05:25,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 11:05:25,790 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-09 11:05:25,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-09 11:05:25,790 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:25,791 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:25,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-09 11:05:25,991 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:25,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:25,992 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-09 11:05:25,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:25,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829624130] [2020-10-09 11:05:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:26,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829624130] [2020-10-09 11:05:26,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075648129] [2020-10-09 11:05:26,092 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 [2020-10-09 11:05:26,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-09 11:05:26,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:26,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 11:05:26,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:26,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:26,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-09 11:05:26,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814262679] [2020-10-09 11:05:26,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 11:05:26,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:26,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 11:05:26,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-09 11:05:26,188 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-09 11:05:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:26,653 INFO L93 Difference]: Finished difference Result 74 states and 181 transitions. [2020-10-09 11:05:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 11:05:26,654 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-09 11:05:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:26,655 INFO L225 Difference]: With dead ends: 74 [2020-10-09 11:05:26,655 INFO L226 Difference]: Without dead ends: 66 [2020-10-09 11:05:26,656 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 11:05:26,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-09 11:05:26,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2020-10-09 11:05:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-09 11:05:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-09 11:05:26,657 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-09 11:05:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:26,657 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-09 11:05:26,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 11:05:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-09 11:05:26,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-09 11:05:26,658 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:26,658 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:26,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:26,858 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:26,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:26,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-09 11:05:26,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:26,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357411559] [2020-10-09 11:05:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:26,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357411559] [2020-10-09 11:05:26,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324804865] [2020-10-09 11:05:26,955 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 [2020-10-09 11:05:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:26,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 11:05:26,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:27,015 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:05:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:27,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:27,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-09 11:05:27,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602681169] [2020-10-09 11:05:27,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 11:05:27,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:27,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 11:05:27,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-09 11:05:27,030 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-09 11:05:27,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:27,532 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-09 11:05:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 11:05:27,533 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-09 11:05:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:27,533 INFO L225 Difference]: With dead ends: 84 [2020-10-09 11:05:27,534 INFO L226 Difference]: Without dead ends: 79 [2020-10-09 11:05:27,534 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 11:05:27,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-09 11:05:27,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-09 11:05:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-09 11:05:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-09 11:05:27,536 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-09 11:05:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:27,537 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-09 11:05:27,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 11:05:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-09 11:05:27,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-09 11:05:27,537 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:27,537 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:27,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-09 11:05:27,739 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:27,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:27,739 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-09 11:05:27,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:27,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137181543] [2020-10-09 11:05:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:27,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137181543] [2020-10-09 11:05:27,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201966788] [2020-10-09 11:05:27,847 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 [2020-10-09 11:05:27,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:05:27,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:27,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 11:05:27,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:27,906 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:05:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:27,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:27,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-09 11:05:27,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992167525] [2020-10-09 11:05:27,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 11:05:27,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:27,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 11:05:27,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-09 11:05:27,920 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-09 11:05:28,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:28,439 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-09 11:05:28,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 11:05:28,439 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-09 11:05:28,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:28,440 INFO L225 Difference]: With dead ends: 72 [2020-10-09 11:05:28,440 INFO L226 Difference]: Without dead ends: 67 [2020-10-09 11:05:28,440 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 11:05:28,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-09 11:05:28,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-09 11:05:28,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-09 11:05:28,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-09 11:05:28,443 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-09 11:05:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:28,444 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-09 11:05:28,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 11:05:28,444 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-09 11:05:28,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-09 11:05:28,444 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:28,444 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:28,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-09 11:05:28,653 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:28,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-09 11:05:28,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:28,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781292099] [2020-10-09 11:05:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:28,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781292099] [2020-10-09 11:05:28,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003487082] [2020-10-09 11:05:28,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:05:28,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-09 11:05:28,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:28,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 11:05:28,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:28,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:28,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-09 11:05:28,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12198322] [2020-10-09 11:05:28,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 11:05:28,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:28,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 11:05:28,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 11:05:28,849 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-09 11:05:29,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:29,075 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-09 11:05:29,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 11:05:29,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-09 11:05:29,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:29,077 INFO L225 Difference]: With dead ends: 78 [2020-10-09 11:05:29,077 INFO L226 Difference]: Without dead ends: 72 [2020-10-09 11:05:29,077 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:05:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-09 11:05:29,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-09 11:05:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-09 11:05:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-09 11:05:29,079 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-09 11:05:29,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:29,080 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-09 11:05:29,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 11:05:29,080 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-09 11:05:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-09 11:05:29,080 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:29,080 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:29,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:29,282 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:29,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:29,282 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-09 11:05:29,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:29,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866128974] [2020-10-09 11:05:29,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:29,423 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:29,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866128974] [2020-10-09 11:05:29,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169519249] [2020-10-09 11:05:29,424 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 [2020-10-09 11:05:29,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:05:29,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:29,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 11:05:29,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:29,483 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:29,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:29,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-09 11:05:29,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153639375] [2020-10-09 11:05:29,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 11:05:29,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:29,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 11:05:29,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-09 11:05:29,495 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-09 11:05:29,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:29,760 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-09 11:05:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 11:05:29,761 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-09 11:05:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:29,762 INFO L225 Difference]: With dead ends: 90 [2020-10-09 11:05:29,762 INFO L226 Difference]: Without dead ends: 84 [2020-10-09 11:05:29,762 INFO L673 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 [2020-10-09 11:05:29,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-09 11:05:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-09 11:05:29,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-09 11:05:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-09 11:05:29,765 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-09 11:05:29,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:29,766 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-09 11:05:29,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 11:05:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-09 11:05:29,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-09 11:05:29,766 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:29,766 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:29,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:29,975 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:29,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:29,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-09 11:05:29,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:29,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228623889] [2020-10-09 11:05:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:30,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228623889] [2020-10-09 11:05:30,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715886476] [2020-10-09 11:05:30,105 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 [2020-10-09 11:05:30,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-09 11:05:30,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:30,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 11:05:30,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:30,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:30,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-09 11:05:30,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240955562] [2020-10-09 11:05:30,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 11:05:30,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:30,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 11:05:30,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-09 11:05:30,158 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-09 11:05:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:30,456 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-09 11:05:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 11:05:30,457 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-09 11:05:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:30,458 INFO L225 Difference]: With dead ends: 91 [2020-10-09 11:05:30,458 INFO L226 Difference]: Without dead ends: 85 [2020-10-09 11:05:30,458 INFO L673 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 [2020-10-09 11:05:30,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-09 11:05:30,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-09 11:05:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-09 11:05:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-09 11:05:30,461 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-09 11:05:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:30,461 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-09 11:05:30,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 11:05:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-09 11:05:30,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-09 11:05:30,461 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:30,461 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:30,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:30,662 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:30,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:30,663 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-09 11:05:30,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:30,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538059985] [2020-10-09 11:05:30,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:30,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538059985] [2020-10-09 11:05:30,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011441119] [2020-10-09 11:05:30,788 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 [2020-10-09 11:05:30,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-09 11:05:30,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:30,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 11:05:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:30,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:30,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:30,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-09 11:05:30,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490261362] [2020-10-09 11:05:30,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 11:05:30,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:30,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 11:05:30,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-09 11:05:30,865 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-09 11:05:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:31,176 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-09 11:05:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 11:05:31,176 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-09 11:05:31,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:31,177 INFO L225 Difference]: With dead ends: 99 [2020-10-09 11:05:31,177 INFO L226 Difference]: Without dead ends: 93 [2020-10-09 11:05:31,178 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-09 11:05:31,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-09 11:05:31,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-09 11:05:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-09 11:05:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-09 11:05:31,180 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-09 11:05:31,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:31,180 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-09 11:05:31,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 11:05:31,180 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-09 11:05:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-09 11:05:31,180 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:31,181 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:31,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:31,390 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:31,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:31,390 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-09 11:05:31,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:31,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427185561] [2020-10-09 11:05:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:31,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427185561] [2020-10-09 11:05:31,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491594066] [2020-10-09 11:05:31,515 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 [2020-10-09 11:05:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:31,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 11:05:31,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:31,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:31,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-09 11:05:31,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236087257] [2020-10-09 11:05:31,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 11:05:31,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:31,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 11:05:31,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-09 11:05:31,572 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-09 11:05:31,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:31,910 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-09 11:05:31,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 11:05:31,911 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-09 11:05:31,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:31,912 INFO L225 Difference]: With dead ends: 99 [2020-10-09 11:05:31,912 INFO L226 Difference]: Without dead ends: 93 [2020-10-09 11:05:31,912 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-09 11:05:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-09 11:05:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-09 11:05:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-09 11:05:31,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-09 11:05:31,914 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-09 11:05:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:31,914 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-09 11:05:31,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 11:05:31,915 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-09 11:05:31,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-09 11:05:31,915 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:31,915 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:32,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-09 11:05:32,116 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:32,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:32,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-09 11:05:32,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:32,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634196006] [2020-10-09 11:05:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:32,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634196006] [2020-10-09 11:05:32,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135719528] [2020-10-09 11:05:32,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:05:32,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:05:32,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:32,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 11:05:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:32,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:32,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:32,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-09 11:05:32,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611171529] [2020-10-09 11:05:32,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 11:05:32,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:32,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 11:05:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-09 11:05:32,310 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-09 11:05:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:32,721 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-09 11:05:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 11:05:32,722 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-09 11:05:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:32,723 INFO L225 Difference]: With dead ends: 96 [2020-10-09 11:05:32,723 INFO L226 Difference]: Without dead ends: 90 [2020-10-09 11:05:32,723 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 11:05:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-09 11:05:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-09 11:05:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-09 11:05:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-09 11:05:32,726 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-09 11:05:32,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:32,726 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-09 11:05:32,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 11:05:32,726 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-09 11:05:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-09 11:05:32,727 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:32,727 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:32,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:32,935 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:32,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:32,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-09 11:05:32,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:32,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459693510] [2020-10-09 11:05:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:33,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459693510] [2020-10-09 11:05:33,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078015242] [2020-10-09 11:05:33,040 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 [2020-10-09 11:05:33,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-09 11:05:33,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:33,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 11:05:33,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:33,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:33,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-09 11:05:33,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177487964] [2020-10-09 11:05:33,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 11:05:33,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:33,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 11:05:33,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-09 11:05:33,131 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-09 11:05:33,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:33,506 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-09 11:05:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 11:05:33,506 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-09 11:05:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:33,507 INFO L225 Difference]: With dead ends: 97 [2020-10-09 11:05:33,508 INFO L226 Difference]: Without dead ends: 91 [2020-10-09 11:05:33,508 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 11:05:33,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-09 11:05:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-09 11:05:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-09 11:05:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-09 11:05:33,511 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-09 11:05:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:33,511 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-09 11:05:33,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 11:05:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-09 11:05:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-09 11:05:33,511 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:33,512 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:33,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-09 11:05:33,712 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:33,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:33,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-09 11:05:33,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:33,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596173911] [2020-10-09 11:05:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:33,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596173911] [2020-10-09 11:05:33,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117120395] [2020-10-09 11:05:33,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:05:33,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:05:33,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:33,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 11:05:33,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:33,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:33,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:33,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-09 11:05:33,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198712885] [2020-10-09 11:05:33,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 11:05:33,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:33,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 11:05:33,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-09 11:05:33,935 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-09 11:05:34,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:34,579 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-09 11:05:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 11:05:34,580 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-09 11:05:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:34,581 INFO L225 Difference]: With dead ends: 94 [2020-10-09 11:05:34,581 INFO L226 Difference]: Without dead ends: 88 [2020-10-09 11:05:34,582 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 11:05:34,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-09 11:05:34,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-09 11:05:34,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-09 11:05:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-09 11:05:34,585 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-09 11:05:34,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:34,586 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-09 11:05:34,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 11:05:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-09 11:05:34,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-09 11:05:34,587 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:34,587 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:34,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:34,788 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:34,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:34,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-09 11:05:34,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:34,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453586478] [2020-10-09 11:05:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:34,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453586478] [2020-10-09 11:05:34,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745432918] [2020-10-09 11:05:34,938 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 [2020-10-09 11:05:35,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-09 11:05:35,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:35,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 11:05:35,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:35,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:35,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-09 11:05:35,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190646103] [2020-10-09 11:05:35,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 11:05:35,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:35,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 11:05:35,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-09 11:05:35,033 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-09 11:05:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:35,542 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-09 11:05:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 11:05:35,542 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-09 11:05:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:35,543 INFO L225 Difference]: With dead ends: 95 [2020-10-09 11:05:35,543 INFO L226 Difference]: Without dead ends: 89 [2020-10-09 11:05:35,544 INFO L673 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 [2020-10-09 11:05:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-09 11:05:35,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-09 11:05:35,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-09 11:05:35,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-09 11:05:35,546 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-09 11:05:35,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:35,546 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-09 11:05:35,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 11:05:35,547 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-09 11:05:35,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-09 11:05:35,547 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:35,547 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:35,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-09 11:05:35,748 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:35,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:35,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-09 11:05:35,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:35,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132508832] [2020-10-09 11:05:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:35,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132508832] [2020-10-09 11:05:35,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668101053] [2020-10-09 11:05:35,857 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 [2020-10-09 11:05:35,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-09 11:05:35,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:35,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 11:05:35,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:35,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:35,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:35,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-09 11:05:35,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893862415] [2020-10-09 11:05:35,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 11:05:35,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:35,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 11:05:35,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-09 11:05:35,957 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-09 11:05:36,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:36,509 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-09 11:05:36,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 11:05:36,509 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-09 11:05:36,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:36,510 INFO L225 Difference]: With dead ends: 92 [2020-10-09 11:05:36,510 INFO L226 Difference]: Without dead ends: 86 [2020-10-09 11:05:36,511 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 11:05:36,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-09 11:05:36,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-09 11:05:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-09 11:05:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-09 11:05:36,513 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-09 11:05:36,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:36,513 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-09 11:05:36,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 11:05:36,513 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-09 11:05:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-09 11:05:36,514 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:36,514 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:36,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:36,722 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:36,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:36,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-09 11:05:36,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:36,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439128039] [2020-10-09 11:05:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:36,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439128039] [2020-10-09 11:05:36,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698644902] [2020-10-09 11:05:36,824 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 [2020-10-09 11:05:36,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:36,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 11:05:36,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:36,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:36,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-09 11:05:36,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942657775] [2020-10-09 11:05:36,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 11:05:36,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:36,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 11:05:36,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 11:05:36,884 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-09 11:05:37,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:37,350 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-09 11:05:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 11:05:37,350 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-09 11:05:37,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:37,351 INFO L225 Difference]: With dead ends: 112 [2020-10-09 11:05:37,351 INFO L226 Difference]: Without dead ends: 106 [2020-10-09 11:05:37,352 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 11:05:37,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-09 11:05:37,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-09 11:05:37,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-09 11:05:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-09 11:05:37,354 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-09 11:05:37,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:37,354 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-09 11:05:37,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 11:05:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-09 11:05:37,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-09 11:05:37,355 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:37,355 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:37,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:37,559 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:37,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:37,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-09 11:05:37,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:37,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275017198] [2020-10-09 11:05:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:37,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275017198] [2020-10-09 11:05:37,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856091151] [2020-10-09 11:05:37,660 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 [2020-10-09 11:05:37,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:05:37,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:37,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 11:05:37,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:37,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:37,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:37,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-09 11:05:37,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188301733] [2020-10-09 11:05:37,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 11:05:37,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:37,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 11:05:37,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-09 11:05:37,778 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-09 11:05:38,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:38,400 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-09 11:05:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 11:05:38,400 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-09 11:05:38,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:38,401 INFO L225 Difference]: With dead ends: 93 [2020-10-09 11:05:38,401 INFO L226 Difference]: Without dead ends: 85 [2020-10-09 11:05:38,401 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-09 11:05:38,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-09 11:05:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-09 11:05:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-09 11:05:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-09 11:05:38,404 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-09 11:05:38,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:38,404 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-09 11:05:38,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 11:05:38,404 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-09 11:05:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-09 11:05:38,404 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:38,405 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:38,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:38,611 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:38,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:38,612 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-09 11:05:38,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:38,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547604850] [2020-10-09 11:05:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:38,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547604850] [2020-10-09 11:05:38,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110271428] [2020-10-09 11:05:38,765 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 [2020-10-09 11:05:38,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-09 11:05:38,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:38,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 11:05:38,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:38,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:38,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-09 11:05:38,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177990518] [2020-10-09 11:05:38,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 11:05:38,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:38,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 11:05:38,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-09 11:05:38,820 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-09 11:05:39,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:39,100 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-09 11:05:39,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 11:05:39,101 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-09 11:05:39,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:39,102 INFO L225 Difference]: With dead ends: 104 [2020-10-09 11:05:39,102 INFO L226 Difference]: Without dead ends: 98 [2020-10-09 11:05:39,102 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:05:39,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-09 11:05:39,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-09 11:05:39,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-09 11:05:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-09 11:05:39,105 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-09 11:05:39,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:39,106 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-09 11:05:39,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 11:05:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-09 11:05:39,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-09 11:05:39,107 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:39,107 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:39,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:39,316 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:39,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:39,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-09 11:05:39,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:39,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905870131] [2020-10-09 11:05:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:39,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905870131] [2020-10-09 11:05:39,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550815718] [2020-10-09 11:05:39,479 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 [2020-10-09 11:05:39,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:05:39,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:39,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 11:05:39,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:39,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:39,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:39,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-09 11:05:39,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389634993] [2020-10-09 11:05:39,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 11:05:39,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:39,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 11:05:39,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 11:05:39,548 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-09 11:05:39,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:39,869 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-09 11:05:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 11:05:39,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-09 11:05:39,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:39,870 INFO L225 Difference]: With dead ends: 101 [2020-10-09 11:05:39,871 INFO L226 Difference]: Without dead ends: 95 [2020-10-09 11:05:39,871 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-09 11:05:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-09 11:05:39,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-09 11:05:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-09 11:05:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-09 11:05:39,874 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-09 11:05:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:39,874 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-09 11:05:39,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 11:05:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-09 11:05:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-09 11:05:39,875 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:39,875 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:40,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:40,085 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:40,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:40,085 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-09 11:05:40,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:40,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603144925] [2020-10-09 11:05:40,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:40,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603144925] [2020-10-09 11:05:40,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207005944] [2020-10-09 11:05:40,228 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 [2020-10-09 11:05:40,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-09 11:05:40,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:40,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 11:05:40,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:40,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:40,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-09 11:05:40,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426484511] [2020-10-09 11:05:40,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 11:05:40,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:40,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 11:05:40,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-09 11:05:40,290 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-09 11:05:40,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:40,615 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-09 11:05:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 11:05:40,616 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-09 11:05:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:40,617 INFO L225 Difference]: With dead ends: 98 [2020-10-09 11:05:40,617 INFO L226 Difference]: Without dead ends: 92 [2020-10-09 11:05:40,617 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-09 11:05:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-09 11:05:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-09 11:05:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-09 11:05:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-09 11:05:40,620 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-09 11:05:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:40,620 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-09 11:05:40,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 11:05:40,621 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-09 11:05:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-09 11:05:40,624 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:40,624 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:40,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:40,834 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:40,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-09 11:05:40,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:40,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191205928] [2020-10-09 11:05:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:40,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191205928] [2020-10-09 11:05:40,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132891269] [2020-10-09 11:05:40,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:05:41,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-09 11:05:41,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:41,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 11:05:41,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:41,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:41,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:41,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-09 11:05:41,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680336236] [2020-10-09 11:05:41,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 11:05:41,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:41,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 11:05:41,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-09 11:05:41,044 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-09 11:05:41,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:41,481 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-09 11:05:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 11:05:41,481 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-09 11:05:41,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:41,482 INFO L225 Difference]: With dead ends: 97 [2020-10-09 11:05:41,483 INFO L226 Difference]: Without dead ends: 91 [2020-10-09 11:05:41,483 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 11:05:41,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-09 11:05:41,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-09 11:05:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-09 11:05:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-09 11:05:41,486 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-09 11:05:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:41,486 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-09 11:05:41,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 11:05:41,486 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-09 11:05:41,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-09 11:05:41,487 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:41,487 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:41,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:41,691 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:41,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:41,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-09 11:05:41,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:41,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110388609] [2020-10-09 11:05:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:41,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110388609] [2020-10-09 11:05:41,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715109384] [2020-10-09 11:05:41,824 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 [2020-10-09 11:05:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:41,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 11:05:41,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:41,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:41,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-09 11:05:41,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575132364] [2020-10-09 11:05:41,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 11:05:41,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:41,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 11:05:41,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-09 11:05:41,888 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-09 11:05:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:42,270 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-09 11:05:42,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 11:05:42,270 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-09 11:05:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:42,271 INFO L225 Difference]: With dead ends: 94 [2020-10-09 11:05:42,272 INFO L226 Difference]: Without dead ends: 88 [2020-10-09 11:05:42,272 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 11:05:42,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-09 11:05:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-09 11:05:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-09 11:05:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-09 11:05:42,275 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-09 11:05:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:42,275 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-09 11:05:42,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 11:05:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-09 11:05:42,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-09 11:05:42,276 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:42,276 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:42,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-09 11:05:42,480 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:42,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:42,480 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-09 11:05:42,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:42,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901683806] [2020-10-09 11:05:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:42,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901683806] [2020-10-09 11:05:42,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823959110] [2020-10-09 11:05:42,623 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 [2020-10-09 11:05:42,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:05:42,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:42,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 11:05:42,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:42,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:42,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:42,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-09 11:05:42,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295531835] [2020-10-09 11:05:42,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 11:05:42,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:42,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 11:05:42,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-09 11:05:42,704 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-09 11:05:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:43,208 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-09 11:05:43,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 11:05:43,209 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-09 11:05:43,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:43,210 INFO L225 Difference]: With dead ends: 93 [2020-10-09 11:05:43,210 INFO L226 Difference]: Without dead ends: 87 [2020-10-09 11:05:43,210 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 11:05:43,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-09 11:05:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-09 11:05:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-09 11:05:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-09 11:05:43,212 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-09 11:05:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:43,212 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-09 11:05:43,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 11:05:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-09 11:05:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-09 11:05:43,213 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:43,213 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:43,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:43,414 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:43,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:43,414 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-09 11:05:43,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:43,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56785394] [2020-10-09 11:05:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:43,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56785394] [2020-10-09 11:05:43,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431938360] [2020-10-09 11:05:43,533 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 [2020-10-09 11:05:43,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-09 11:05:43,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:43,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 11:05:43,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:43,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:43,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-09 11:05:43,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760383401] [2020-10-09 11:05:43,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 11:05:43,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:43,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 11:05:43,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-09 11:05:43,600 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-09 11:05:44,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:44,025 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-09 11:05:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 11:05:44,026 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-09 11:05:44,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:44,027 INFO L225 Difference]: With dead ends: 90 [2020-10-09 11:05:44,027 INFO L226 Difference]: Without dead ends: 84 [2020-10-09 11:05:44,027 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 11:05:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-09 11:05:44,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-09 11:05:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-09 11:05:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-09 11:05:44,029 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-09 11:05:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:44,029 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-09 11:05:44,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 11:05:44,029 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-09 11:05:44,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-09 11:05:44,030 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:44,030 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:44,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-09 11:05:44,231 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:44,231 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-09 11:05:44,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:44,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363183551] [2020-10-09 11:05:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:44,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363183551] [2020-10-09 11:05:44,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073781162] [2020-10-09 11:05:44,355 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 [2020-10-09 11:05:44,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:05:44,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:44,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 11:05:44,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:44,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:44,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:44,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-09 11:05:44,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245537042] [2020-10-09 11:05:44,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 11:05:44,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:44,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 11:05:44,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-09 11:05:44,430 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-09 11:05:44,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:44,968 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-09 11:05:44,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 11:05:44,968 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-09 11:05:44,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:44,969 INFO L225 Difference]: With dead ends: 89 [2020-10-09 11:05:44,969 INFO L226 Difference]: Without dead ends: 83 [2020-10-09 11:05:44,970 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 11:05:44,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-09 11:05:44,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-09 11:05:44,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-09 11:05:44,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-09 11:05:44,973 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-09 11:05:44,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:44,973 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-09 11:05:44,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 11:05:44,973 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-09 11:05:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-09 11:05:44,973 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:44,974 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:45,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:45,178 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:45,179 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-09 11:05:45,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:45,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442537872] [2020-10-09 11:05:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:45,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442537872] [2020-10-09 11:05:45,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525264643] [2020-10-09 11:05:45,290 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 [2020-10-09 11:05:45,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-09 11:05:45,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:45,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 11:05:45,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:45,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:45,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-09 11:05:45,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129241541] [2020-10-09 11:05:45,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 11:05:45,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:45,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 11:05:45,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-09 11:05:45,368 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-09 11:05:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:45,853 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-09 11:05:45,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 11:05:45,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-09 11:05:45,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:45,855 INFO L225 Difference]: With dead ends: 86 [2020-10-09 11:05:45,855 INFO L226 Difference]: Without dead ends: 80 [2020-10-09 11:05:45,856 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 11:05:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-09 11:05:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-09 11:05:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-09 11:05:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-09 11:05:45,858 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-09 11:05:45,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:45,858 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-09 11:05:45,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 11:05:45,859 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-09 11:05:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-09 11:05:45,859 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:45,859 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:46,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:46,063 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:46,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:46,063 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-09 11:05:46,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:46,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987569476] [2020-10-09 11:05:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:46,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987569476] [2020-10-09 11:05:46,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369675396] [2020-10-09 11:05:46,177 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 [2020-10-09 11:05:46,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-09 11:05:46,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:46,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 11:05:46,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:46,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:46,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:46,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-09 11:05:46,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537506899] [2020-10-09 11:05:46,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 11:05:46,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:46,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 11:05:46,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-09 11:05:46,264 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-09 11:05:46,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:46,929 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-09 11:05:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 11:05:46,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-09 11:05:46,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:46,930 INFO L225 Difference]: With dead ends: 85 [2020-10-09 11:05:46,930 INFO L226 Difference]: Without dead ends: 79 [2020-10-09 11:05:46,931 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 11:05:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-09 11:05:46,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-09 11:05:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-09 11:05:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-09 11:05:46,935 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-09 11:05:46,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:46,935 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-09 11:05:46,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 11:05:46,936 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-09 11:05:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-09 11:05:46,936 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:46,936 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:47,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:47,145 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:47,146 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-09 11:05:47,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:47,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410821299] [2020-10-09 11:05:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:47,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410821299] [2020-10-09 11:05:47,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177550590] [2020-10-09 11:05:47,269 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 [2020-10-09 11:05:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:47,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 11:05:47,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:47,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:47,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-09 11:05:47,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990447577] [2020-10-09 11:05:47,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 11:05:47,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:47,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 11:05:47,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-09 11:05:47,331 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-09 11:05:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:47,842 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-09 11:05:47,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 11:05:47,843 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-09 11:05:47,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:47,844 INFO L225 Difference]: With dead ends: 101 [2020-10-09 11:05:47,844 INFO L226 Difference]: Without dead ends: 95 [2020-10-09 11:05:47,844 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-09 11:05:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-09 11:05:47,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-09 11:05:47,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-09 11:05:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-09 11:05:47,846 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-09 11:05:47,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:47,847 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-09 11:05:47,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 11:05:47,847 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-09 11:05:47,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-09 11:05:47,847 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:47,847 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:48,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:48,048 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:48,048 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-09 11:05:48,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:48,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877826461] [2020-10-09 11:05:48,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:48,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877826461] [2020-10-09 11:05:48,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090107238] [2020-10-09 11:05:48,167 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 [2020-10-09 11:05:48,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:05:48,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:48,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:05:48,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:48,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:48,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-09 11:05:48,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316904154] [2020-10-09 11:05:48,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 11:05:48,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:48,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 11:05:48,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-09 11:05:48,248 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-09 11:05:48,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:48,863 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-10-09 11:05:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 11:05:48,863 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-09 11:05:48,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:48,864 INFO L225 Difference]: With dead ends: 80 [2020-10-09 11:05:48,864 INFO L226 Difference]: Without dead ends: 72 [2020-10-09 11:05:48,864 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 11:05:48,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-09 11:05:48,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-09 11:05:48,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-09 11:05:48,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-09 11:05:48,867 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-09 11:05:48,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:48,867 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-09 11:05:48,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 11:05:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-09 11:05:48,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-09 11:05:48,869 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:48,869 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:49,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:49,076 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-09 11:05:49,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:49,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100635736] [2020-10-09 11:05:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:49,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100635736] [2020-10-09 11:05:49,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610384328] [2020-10-09 11:05:49,191 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 [2020-10-09 11:05:49,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-09 11:05:49,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:49,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 11:05:49,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:49,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:05:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:49,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:49,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-09 11:05:49,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459109517] [2020-10-09 11:05:49,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 11:05:49,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:49,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 11:05:49,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 11:05:49,276 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-09 11:05:49,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:49,893 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-09 11:05:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 11:05:49,894 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-09 11:05:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:49,895 INFO L225 Difference]: With dead ends: 92 [2020-10-09 11:05:49,895 INFO L226 Difference]: Without dead ends: 87 [2020-10-09 11:05:49,895 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-09 11:05:49,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-09 11:05:49,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-09 11:05:49,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-09 11:05:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-09 11:05:49,898 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-09 11:05:49,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:49,898 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-09 11:05:49,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 11:05:49,898 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-09 11:05:49,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:05:49,898 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:49,899 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:50,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:50,106 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:50,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:50,106 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-09 11:05:50,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:50,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896451897] [2020-10-09 11:05:50,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:50,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896451897] [2020-10-09 11:05:50,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334378352] [2020-10-09 11:05:50,236 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 [2020-10-09 11:05:50,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:05:50,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:50,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:05:50,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:50,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:05:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:50,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:50,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-09 11:05:50,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265310233] [2020-10-09 11:05:50,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:05:50,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:50,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:05:50,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:05:50,315 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-09 11:05:50,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:50,987 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-09 11:05:50,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 11:05:50,987 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-09 11:05:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:50,988 INFO L225 Difference]: With dead ends: 78 [2020-10-09 11:05:50,988 INFO L226 Difference]: Without dead ends: 73 [2020-10-09 11:05:50,989 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-09 11:05:50,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-09 11:05:50,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-09 11:05:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-09 11:05:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-09 11:05:50,991 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-09 11:05:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:50,991 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-09 11:05:50,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:05:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-09 11:05:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:05:50,992 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:50,992 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:51,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-09 11:05:51,194 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:51,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:51,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-09 11:05:51,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:51,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706476990] [2020-10-09 11:05:51,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:51,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706476990] [2020-10-09 11:05:51,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308042204] [2020-10-09 11:05:51,366 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 [2020-10-09 11:05:51,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-09 11:05:51,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:51,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:05:51,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:51,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:51,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-09 11:05:51,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076864243] [2020-10-09 11:05:51,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 11:05:51,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:51,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 11:05:51,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-09 11:05:51,424 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-09 11:05:51,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:51,710 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-09 11:05:51,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 11:05:51,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-09 11:05:51,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:51,711 INFO L225 Difference]: With dead ends: 84 [2020-10-09 11:05:51,711 INFO L226 Difference]: Without dead ends: 78 [2020-10-09 11:05:51,712 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:05:51,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-09 11:05:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-09 11:05:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-09 11:05:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-09 11:05:51,714 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-09 11:05:51,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:51,714 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-09 11:05:51,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 11:05:51,714 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-09 11:05:51,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:05:51,715 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:51,715 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:51,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:51,916 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:51,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:51,916 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-09 11:05:51,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:51,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798585492] [2020-10-09 11:05:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:52,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798585492] [2020-10-09 11:05:52,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942490309] [2020-10-09 11:05:52,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:05:52,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-09 11:05:52,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:52,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:05:52,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:52,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:52,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:52,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-09 11:05:52,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062673681] [2020-10-09 11:05:52,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:05:52,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:52,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:05:52,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:05:52,160 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-09 11:05:52,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:52,495 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-09 11:05:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 11:05:52,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-09 11:05:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:52,497 INFO L225 Difference]: With dead ends: 98 [2020-10-09 11:05:52,497 INFO L226 Difference]: Without dead ends: 92 [2020-10-09 11:05:52,497 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-09 11:05:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-09 11:05:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-09 11:05:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-09 11:05:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-09 11:05:52,499 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-09 11:05:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:52,500 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-09 11:05:52,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:05:52,500 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-09 11:05:52,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:05:52,500 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:52,500 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:52,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-09 11:05:52,701 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:52,702 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-09 11:05:52,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:52,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103634820] [2020-10-09 11:05:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:52,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103634820] [2020-10-09 11:05:52,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636907629] [2020-10-09 11:05:52,871 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 [2020-10-09 11:05:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:52,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:05:52,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:52,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:52,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-09 11:05:52,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785256609] [2020-10-09 11:05:52,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 11:05:52,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:52,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 11:05:52,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 11:05:52,926 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-09 11:05:53,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:53,372 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-09 11:05:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 11:05:53,372 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-09 11:05:53,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:53,373 INFO L225 Difference]: With dead ends: 99 [2020-10-09 11:05:53,373 INFO L226 Difference]: Without dead ends: 93 [2020-10-09 11:05:53,374 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 11:05:53,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-09 11:05:53,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-09 11:05:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-09 11:05:53,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-09 11:05:53,376 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-09 11:05:53,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:53,376 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-09 11:05:53,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 11:05:53,376 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-09 11:05:53,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:05:53,377 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:53,377 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:53,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:53,578 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:53,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:53,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-09 11:05:53,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:53,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359141943] [2020-10-09 11:05:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:53,802 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:53,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359141943] [2020-10-09 11:05:53,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478301872] [2020-10-09 11:05:53,802 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 [2020-10-09 11:05:53,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:05:53,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:53,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:05:53,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:53,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:53,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:53,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-09 11:05:53,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441820300] [2020-10-09 11:05:53,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:05:53,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:53,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:05:53,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:05:53,947 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-09 11:05:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:54,362 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-09 11:05:54,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 11:05:54,363 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-09 11:05:54,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:54,364 INFO L225 Difference]: With dead ends: 109 [2020-10-09 11:05:54,364 INFO L226 Difference]: Without dead ends: 103 [2020-10-09 11:05:54,364 INFO L673 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 [2020-10-09 11:05:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-09 11:05:54,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-09 11:05:54,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-09 11:05:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-09 11:05:54,366 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-09 11:05:54,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:54,366 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-09 11:05:54,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:05:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-09 11:05:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:05:54,367 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:54,367 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:54,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:54,576 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:54,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:54,576 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-09 11:05:54,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:54,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721405940] [2020-10-09 11:05:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:54,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721405940] [2020-10-09 11:05:54,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615012261] [2020-10-09 11:05:54,732 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 [2020-10-09 11:05:54,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-09 11:05:54,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:54,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:05:54,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:54,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:54,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-09 11:05:54,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390295568] [2020-10-09 11:05:54,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 11:05:54,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:54,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 11:05:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-09 11:05:54,790 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-09 11:05:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:55,201 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-09 11:05:55,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 11:05:55,202 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-09 11:05:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:55,203 INFO L225 Difference]: With dead ends: 109 [2020-10-09 11:05:55,203 INFO L226 Difference]: Without dead ends: 103 [2020-10-09 11:05:55,204 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 11:05:55,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-09 11:05:55,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-09 11:05:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-09 11:05:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-09 11:05:55,206 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-09 11:05:55,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:55,206 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-09 11:05:55,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 11:05:55,206 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-09 11:05:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:05:55,207 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:55,207 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:55,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-09 11:05:55,411 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:55,411 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-09 11:05:55,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:55,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675724084] [2020-10-09 11:05:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:55,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675724084] [2020-10-09 11:05:55,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792844162] [2020-10-09 11:05:55,583 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 [2020-10-09 11:05:55,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:05:55,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:55,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:05:55,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:55,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:55,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:55,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-09 11:05:55,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815237590] [2020-10-09 11:05:55,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:05:55,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:55,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:05:55,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:05:55,665 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-09 11:05:56,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:56,175 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-09 11:05:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 11:05:56,176 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-09 11:05:56,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:56,177 INFO L225 Difference]: With dead ends: 106 [2020-10-09 11:05:56,177 INFO L226 Difference]: Without dead ends: 100 [2020-10-09 11:05:56,178 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 11:05:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-09 11:05:56,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-09 11:05:56,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-09 11:05:56,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-09 11:05:56,180 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-09 11:05:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:56,181 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-09 11:05:56,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:05:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-09 11:05:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:05:56,181 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:56,182 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:56,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-09 11:05:56,392 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:56,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-09 11:05:56,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:56,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115016084] [2020-10-09 11:05:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:56,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115016084] [2020-10-09 11:05:56,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232898045] [2020-10-09 11:05:56,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:05:56,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-09 11:05:56,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:56,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:05:56,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:56,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:56,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-09 11:05:56,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988544310] [2020-10-09 11:05:56,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 11:05:56,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:56,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 11:05:56,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-09 11:05:56,598 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-09 11:05:57,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:57,055 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-09 11:05:57,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 11:05:57,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-09 11:05:57,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:57,057 INFO L225 Difference]: With dead ends: 107 [2020-10-09 11:05:57,057 INFO L226 Difference]: Without dead ends: 101 [2020-10-09 11:05:57,057 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 11:05:57,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-09 11:05:57,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-09 11:05:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-09 11:05:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-09 11:05:57,059 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-09 11:05:57,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:57,059 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-09 11:05:57,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 11:05:57,059 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-09 11:05:57,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:05:57,060 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:57,060 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:57,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:57,267 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:57,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:57,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-09 11:05:57,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:57,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909367554] [2020-10-09 11:05:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:57,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909367554] [2020-10-09 11:05:57,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651080272] [2020-10-09 11:05:57,425 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 [2020-10-09 11:05:57,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-09 11:05:57,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:57,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:05:57,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:57,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:57,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:57,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-09 11:05:57,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130029626] [2020-10-09 11:05:57,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:05:57,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:57,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:05:57,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:05:57,506 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-09 11:05:58,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:58,056 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-09 11:05:58,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 11:05:58,056 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-09 11:05:58,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:58,057 INFO L225 Difference]: With dead ends: 104 [2020-10-09 11:05:58,057 INFO L226 Difference]: Without dead ends: 98 [2020-10-09 11:05:58,057 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-09 11:05:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-09 11:05:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-09 11:05:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-09 11:05:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-09 11:05:58,059 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-09 11:05:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:58,060 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-09 11:05:58,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:05:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-09 11:05:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:05:58,060 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:58,060 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:58,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-09 11:05:58,264 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:58,264 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-09 11:05:58,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:58,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279318449] [2020-10-09 11:05:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:58,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279318449] [2020-10-09 11:05:58,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030011850] [2020-10-09 11:05:58,410 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 [2020-10-09 11:05:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:58,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:05:58,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:58,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:58,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-09 11:05:58,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190085025] [2020-10-09 11:05:58,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 11:05:58,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:58,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 11:05:58,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-09 11:05:58,469 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-09 11:05:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:05:58,980 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-09 11:05:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 11:05:58,981 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-09 11:05:58,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:05:58,981 INFO L225 Difference]: With dead ends: 105 [2020-10-09 11:05:58,981 INFO L226 Difference]: Without dead ends: 99 [2020-10-09 11:05:58,982 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 11:05:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-09 11:05:58,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-09 11:05:58,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-09 11:05:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-09 11:05:58,985 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-09 11:05:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:05:58,985 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-09 11:05:58,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 11:05:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-09 11:05:58,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:05:58,985 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:05:58,986 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:05:59,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:05:59,193 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:05:59,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:05:59,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-09 11:05:59,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:05:59,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881017992] [2020-10-09 11:05:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:05:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:05:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:59,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881017992] [2020-10-09 11:05:59,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524051222] [2020-10-09 11:05:59,340 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 [2020-10-09 11:05:59,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:05:59,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:05:59,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:05:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:05:59,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:05:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:05:59,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:05:59,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-09 11:05:59,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060885970] [2020-10-09 11:05:59,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:05:59,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:05:59,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:05:59,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:05:59,414 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-09 11:06:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:00,035 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-09 11:06:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 11:06:00,036 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-09 11:06:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:00,036 INFO L225 Difference]: With dead ends: 102 [2020-10-09 11:06:00,037 INFO L226 Difference]: Without dead ends: 96 [2020-10-09 11:06:00,037 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 11:06:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-09 11:06:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-09 11:06:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-09 11:06:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-09 11:06:00,039 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-09 11:06:00,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:00,039 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-09 11:06:00,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:06:00,040 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-09 11:06:00,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:06:00,040 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:00,040 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:00,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-09 11:06:00,241 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:00,242 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-09 11:06:00,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:00,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038290526] [2020-10-09 11:06:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:00,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038290526] [2020-10-09 11:06:00,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790353710] [2020-10-09 11:06:00,382 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 [2020-10-09 11:06:00,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-09 11:06:00,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:00,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:06:00,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:00,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:00,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-09 11:06:00,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252111195] [2020-10-09 11:06:00,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 11:06:00,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:00,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 11:06:00,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 11:06:00,446 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-09 11:06:00,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:00,993 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-09 11:06:00,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 11:06:00,994 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-09 11:06:00,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:00,995 INFO L225 Difference]: With dead ends: 103 [2020-10-09 11:06:00,995 INFO L226 Difference]: Without dead ends: 97 [2020-10-09 11:06:00,995 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-09 11:06:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-09 11:06:00,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-09 11:06:00,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-09 11:06:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-09 11:06:00,997 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-09 11:06:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:00,998 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-09 11:06:00,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 11:06:00,998 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-09 11:06:00,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:06:00,998 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:00,998 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:01,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:01,199 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:01,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:01,199 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-09 11:06:01,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:01,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137930702] [2020-10-09 11:06:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:01,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137930702] [2020-10-09 11:06:01,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461101761] [2020-10-09 11:06:01,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:06:01,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:06:01,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:01,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:06:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:01,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:01,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:01,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-09 11:06:01,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790272272] [2020-10-09 11:06:01,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:06:01,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:01,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:06:01,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:06:01,466 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-09 11:06:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:02,158 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-09 11:06:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 11:06:02,159 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-09 11:06:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:02,160 INFO L225 Difference]: With dead ends: 100 [2020-10-09 11:06:02,160 INFO L226 Difference]: Without dead ends: 94 [2020-10-09 11:06:02,160 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-09 11:06:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-09 11:06:02,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-09 11:06:02,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-09 11:06:02,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-09 11:06:02,162 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-09 11:06:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:02,163 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-09 11:06:02,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:06:02,163 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-09 11:06:02,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:06:02,163 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:02,164 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:02,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-09 11:06:02,372 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:02,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:02,372 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-09 11:06:02,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:02,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929839317] [2020-10-09 11:06:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:02,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929839317] [2020-10-09 11:06:02,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622939928] [2020-10-09 11:06:02,509 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 [2020-10-09 11:06:02,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-09 11:06:02,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:02,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:06:02,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:02,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:02,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-09 11:06:02,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773202841] [2020-10-09 11:06:02,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 11:06:02,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:02,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 11:06:02,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-09 11:06:02,581 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-09 11:06:03,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:03,204 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-09 11:06:03,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:06:03,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-09 11:06:03,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:03,205 INFO L225 Difference]: With dead ends: 120 [2020-10-09 11:06:03,205 INFO L226 Difference]: Without dead ends: 114 [2020-10-09 11:06:03,206 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 11:06:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-09 11:06:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-09 11:06:03,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-09 11:06:03,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-09 11:06:03,207 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-09 11:06:03,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:03,208 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-09 11:06:03,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 11:06:03,208 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-09 11:06:03,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-09 11:06:03,208 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:03,208 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:03,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-09 11:06:03,409 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:03,409 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-09 11:06:03,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:03,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230498332] [2020-10-09 11:06:03,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:03,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230498332] [2020-10-09 11:06:03,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881426019] [2020-10-09 11:06:03,545 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 [2020-10-09 11:06:03,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-09 11:06:03,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-09 11:06:03,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:03,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:03,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:03,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-09 11:06:03,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066383780] [2020-10-09 11:06:03,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:06:03,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:03,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:06:03,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:06:03,628 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-09 11:06:04,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:04,432 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-09 11:06:04,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 11:06:04,433 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-09 11:06:04,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:04,433 INFO L225 Difference]: With dead ends: 101 [2020-10-09 11:06:04,433 INFO L226 Difference]: Without dead ends: 93 [2020-10-09 11:06:04,434 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-09 11:06:04,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-09 11:06:04,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-09 11:06:04,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-09 11:06:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-09 11:06:04,436 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-09 11:06:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:04,436 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-09 11:06:04,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:06:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-09 11:06:04,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:04,436 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:04,436 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:04,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:04,637 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:04,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:04,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-09 11:06:04,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:04,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435888785] [2020-10-09 11:06:04,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:04,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435888785] [2020-10-09 11:06:04,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44524074] [2020-10-09 11:06:04,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:06:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:04,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:04,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:04,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:04,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-09 11:06:04,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690478173] [2020-10-09 11:06:04,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:06:04,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:04,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:06:04,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:06:04,895 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-09 11:06:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:05,248 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-09 11:06:05,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 11:06:05,249 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-09 11:06:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:05,250 INFO L225 Difference]: With dead ends: 114 [2020-10-09 11:06:05,250 INFO L226 Difference]: Without dead ends: 108 [2020-10-09 11:06:05,250 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 11:06:05,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-09 11:06:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-09 11:06:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-09 11:06:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-09 11:06:05,252 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-09 11:06:05,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:05,253 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-09 11:06:05,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:06:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-09 11:06:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:05,253 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:05,253 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:05,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:05,454 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:05,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:05,454 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-09 11:06:05,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:05,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489208308] [2020-10-09 11:06:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:05,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489208308] [2020-10-09 11:06:05,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347918996] [2020-10-09 11:06:05,655 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 [2020-10-09 11:06:05,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:06:05,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:05,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:05,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:05,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:05,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:05,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-09 11:06:05,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754201653] [2020-10-09 11:06:05,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:05,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:05,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:05,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:05,740 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-09 11:06:06,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:06,178 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-09 11:06:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 11:06:06,179 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-09 11:06:06,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:06,179 INFO L225 Difference]: With dead ends: 111 [2020-10-09 11:06:06,179 INFO L226 Difference]: Without dead ends: 105 [2020-10-09 11:06:06,180 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 11:06:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-09 11:06:06,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-09 11:06:06,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-09 11:06:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-09 11:06:06,182 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-09 11:06:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:06,182 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-09 11:06:06,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-09 11:06:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:06,183 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:06,183 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:06,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-09 11:06:06,383 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:06,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:06,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-09 11:06:06,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:06,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033763223] [2020-10-09 11:06:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:06,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033763223] [2020-10-09 11:06:06,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503115858] [2020-10-09 11:06:06,568 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 [2020-10-09 11:06:06,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-09 11:06:06,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:06,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:06,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:06,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:06,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-09 11:06:06,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796562811] [2020-10-09 11:06:06,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:06:06,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:06,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:06:06,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:06:06,634 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-09 11:06:07,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:07,022 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-09 11:06:07,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 11:06:07,023 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-09 11:06:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:07,024 INFO L225 Difference]: With dead ends: 108 [2020-10-09 11:06:07,024 INFO L226 Difference]: Without dead ends: 102 [2020-10-09 11:06:07,024 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 11:06:07,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-09 11:06:07,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-09 11:06:07,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-09 11:06:07,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-09 11:06:07,026 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-09 11:06:07,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:07,026 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-09 11:06:07,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:06:07,027 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-09 11:06:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:07,027 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:07,027 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:07,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:07,233 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:07,233 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-09 11:06:07,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:07,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624684588] [2020-10-09 11:06:07,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:07,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624684588] [2020-10-09 11:06:07,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699180025] [2020-10-09 11:06:07,427 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 [2020-10-09 11:06:07,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:06:07,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:07,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:07,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:07,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:07,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:07,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-09 11:06:07,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781537748] [2020-10-09 11:06:07,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:07,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:07,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:07,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:07,512 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-09 11:06:08,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:08,049 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-09 11:06:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 11:06:08,050 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-09 11:06:08,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:08,051 INFO L225 Difference]: With dead ends: 107 [2020-10-09 11:06:08,051 INFO L226 Difference]: Without dead ends: 101 [2020-10-09 11:06:08,051 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 11:06:08,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-09 11:06:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-09 11:06:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-09 11:06:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-09 11:06:08,054 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-09 11:06:08,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:08,054 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-09 11:06:08,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-09 11:06:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:08,056 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:08,056 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:08,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-09 11:06:08,265 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:08,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:08,265 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-09 11:06:08,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:08,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153711858] [2020-10-09 11:06:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:08,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153711858] [2020-10-09 11:06:08,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885479724] [2020-10-09 11:06:08,446 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 [2020-10-09 11:06:08,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-09 11:06:08,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:08,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:08,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:08,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:08,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-09 11:06:08,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982484793] [2020-10-09 11:06:08,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:06:08,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:08,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:06:08,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:06:08,506 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-09 11:06:08,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:08,988 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-09 11:06:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 11:06:08,988 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-09 11:06:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:08,989 INFO L225 Difference]: With dead ends: 104 [2020-10-09 11:06:08,989 INFO L226 Difference]: Without dead ends: 98 [2020-10-09 11:06:08,990 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 11:06:08,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-09 11:06:08,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-09 11:06:08,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-09 11:06:08,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-09 11:06:08,991 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-09 11:06:08,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:08,991 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-09 11:06:08,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:06:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-09 11:06:08,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:08,992 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:08,992 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:09,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-09 11:06:09,192 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:09,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:09,193 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-09 11:06:09,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:09,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202437889] [2020-10-09 11:06:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:09,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202437889] [2020-10-09 11:06:09,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866835180] [2020-10-09 11:06:09,380 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 [2020-10-09 11:06:09,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-09 11:06:09,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:09,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:09,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:09,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:09,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:09,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-09 11:06:09,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102763790] [2020-10-09 11:06:09,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:09,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:09,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:09,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:09,461 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-09 11:06:10,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:10,068 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-09 11:06:10,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 11:06:10,068 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-09 11:06:10,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:10,069 INFO L225 Difference]: With dead ends: 103 [2020-10-09 11:06:10,069 INFO L226 Difference]: Without dead ends: 97 [2020-10-09 11:06:10,070 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 11:06:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-09 11:06:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-09 11:06:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-09 11:06:10,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-09 11:06:10,072 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-09 11:06:10,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:10,073 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-09 11:06:10,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:10,073 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-09 11:06:10,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:10,073 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:10,073 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:10,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-09 11:06:10,279 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:10,279 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-09 11:06:10,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:10,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851111211] [2020-10-09 11:06:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:10,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851111211] [2020-10-09 11:06:10,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167734033] [2020-10-09 11:06:10,445 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 [2020-10-09 11:06:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:10,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:10,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:10,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:10,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-09 11:06:10,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166537523] [2020-10-09 11:06:10,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:06:10,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:10,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:06:10,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:06:10,505 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-09 11:06:11,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:11,014 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-09 11:06:11,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 11:06:11,015 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-09 11:06:11,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:11,016 INFO L225 Difference]: With dead ends: 100 [2020-10-09 11:06:11,016 INFO L226 Difference]: Without dead ends: 94 [2020-10-09 11:06:11,016 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-09 11:06:11,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-09 11:06:11,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-09 11:06:11,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-09 11:06:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-09 11:06:11,019 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-09 11:06:11,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:11,019 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-09 11:06:11,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:06:11,019 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-09 11:06:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:11,020 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:11,020 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:11,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:11,229 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:11,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-09 11:06:11,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:11,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889452317] [2020-10-09 11:06:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:11,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889452317] [2020-10-09 11:06:11,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182665055] [2020-10-09 11:06:11,397 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 [2020-10-09 11:06:11,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:06:11,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:11,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:11,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:11,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:11,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:11,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-09 11:06:11,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756299080] [2020-10-09 11:06:11,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:11,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:11,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:11,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:11,478 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-09 11:06:12,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:12,145 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-09 11:06:12,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 11:06:12,145 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-09 11:06:12,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:12,146 INFO L225 Difference]: With dead ends: 99 [2020-10-09 11:06:12,146 INFO L226 Difference]: Without dead ends: 93 [2020-10-09 11:06:12,146 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-09 11:06:12,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-09 11:06:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-09 11:06:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-09 11:06:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-09 11:06:12,148 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-09 11:06:12,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:12,149 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-09 11:06:12,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:12,149 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-09 11:06:12,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:12,149 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:12,149 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:12,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-09 11:06:12,350 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:12,351 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-09 11:06:12,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:12,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358818260] [2020-10-09 11:06:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:12,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358818260] [2020-10-09 11:06:12,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226817052] [2020-10-09 11:06:12,506 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 [2020-10-09 11:06:12,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-09 11:06:12,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:12,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:12,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:12,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:12,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-09 11:06:12,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988395378] [2020-10-09 11:06:12,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:06:12,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:12,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:06:12,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:06:12,574 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-09 11:06:13,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:13,130 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-09 11:06:13,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 11:06:13,131 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-09 11:06:13,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:13,132 INFO L225 Difference]: With dead ends: 96 [2020-10-09 11:06:13,132 INFO L226 Difference]: Without dead ends: 90 [2020-10-09 11:06:13,132 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 11:06:13,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-09 11:06:13,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-09 11:06:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-09 11:06:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-09 11:06:13,135 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-09 11:06:13,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:13,135 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-09 11:06:13,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:06:13,136 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-09 11:06:13,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:13,136 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:13,136 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:13,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:13,339 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:13,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-09 11:06:13,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:13,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481072948] [2020-10-09 11:06:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:13,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481072948] [2020-10-09 11:06:13,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225293241] [2020-10-09 11:06:13,491 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 [2020-10-09 11:06:13,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:06:13,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:13,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:13,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:13,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:13,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:13,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-09 11:06:13,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855982195] [2020-10-09 11:06:13,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:13,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:13,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:13,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:13,574 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-09 11:06:14,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:14,319 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-09 11:06:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 11:06:14,319 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-09 11:06:14,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:14,320 INFO L225 Difference]: With dead ends: 95 [2020-10-09 11:06:14,320 INFO L226 Difference]: Without dead ends: 89 [2020-10-09 11:06:14,320 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 11:06:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-09 11:06:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-09 11:06:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-09 11:06:14,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-09 11:06:14,323 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-09 11:06:14,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:14,323 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-09 11:06:14,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:14,323 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-09 11:06:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:14,323 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:14,323 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:14,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:14,524 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:14,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-09 11:06:14,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:14,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367283706] [2020-10-09 11:06:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:14,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367283706] [2020-10-09 11:06:14,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344072393] [2020-10-09 11:06:14,690 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 [2020-10-09 11:06:14,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-09 11:06:14,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:14,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:14,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:14,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:14,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-09 11:06:14,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023075522] [2020-10-09 11:06:14,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:06:14,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:14,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:06:14,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:06:14,813 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-09 11:06:15,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:15,482 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-09 11:06:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 11:06:15,483 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-09 11:06:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:15,483 INFO L225 Difference]: With dead ends: 92 [2020-10-09 11:06:15,484 INFO L226 Difference]: Without dead ends: 86 [2020-10-09 11:06:15,484 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-09 11:06:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-09 11:06:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-09 11:06:15,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-09 11:06:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-09 11:06:15,486 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-09 11:06:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:15,486 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-09 11:06:15,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:06:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-09 11:06:15,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:15,487 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:15,488 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:15,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:15,695 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:15,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:15,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-09 11:06:15,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:15,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519619210] [2020-10-09 11:06:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:15,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519619210] [2020-10-09 11:06:15,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162684465] [2020-10-09 11:06:15,854 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 [2020-10-09 11:06:15,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-09 11:06:15,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:15,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:15,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:15,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:15,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:15,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-09 11:06:15,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543154878] [2020-10-09 11:06:15,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:15,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:15,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:15,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:15,939 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-09 11:06:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:16,770 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-09 11:06:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 11:06:16,771 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-09 11:06:16,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:16,772 INFO L225 Difference]: With dead ends: 91 [2020-10-09 11:06:16,772 INFO L226 Difference]: Without dead ends: 85 [2020-10-09 11:06:16,772 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-09 11:06:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-09 11:06:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-09 11:06:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-09 11:06:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-09 11:06:16,774 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-09 11:06:16,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:16,774 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-09 11:06:16,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-09 11:06:16,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:16,775 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:16,775 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:16,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:16,976 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:16,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-09 11:06:16,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:16,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931911495] [2020-10-09 11:06:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:17,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931911495] [2020-10-09 11:06:17,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165050144] [2020-10-09 11:06:17,125 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 [2020-10-09 11:06:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:17,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:17,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:17,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:17,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-09 11:06:17,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580673397] [2020-10-09 11:06:17,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 11:06:17,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:17,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 11:06:17,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-09 11:06:17,190 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-09 11:06:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:17,848 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-09 11:06:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:06:17,849 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-09 11:06:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:17,849 INFO L225 Difference]: With dead ends: 107 [2020-10-09 11:06:17,849 INFO L226 Difference]: Without dead ends: 101 [2020-10-09 11:06:17,850 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-09 11:06:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-09 11:06:17,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-09 11:06:17,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-09 11:06:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-09 11:06:17,852 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-09 11:06:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:17,852 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-09 11:06:17,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 11:06:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-09 11:06:17,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:17,852 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:17,853 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:18,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-09 11:06:18,053 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:18,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-09 11:06:18,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:18,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798143385] [2020-10-09 11:06:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:18,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798143385] [2020-10-09 11:06:18,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680078834] [2020-10-09 11:06:18,214 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 [2020-10-09 11:06:18,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:06:18,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:18,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:18,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:18,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:18,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:18,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-09 11:06:18,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187670505] [2020-10-09 11:06:18,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:18,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:18,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:18,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:18,340 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-09 11:06:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:19,270 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-09 11:06:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 11:06:19,271 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-09 11:06:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:19,271 INFO L225 Difference]: With dead ends: 88 [2020-10-09 11:06:19,271 INFO L226 Difference]: Without dead ends: 80 [2020-10-09 11:06:19,272 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-09 11:06:19,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-09 11:06:19,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-09 11:06:19,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-09 11:06:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-09 11:06:19,274 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-09 11:06:19,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:19,274 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-09 11:06:19,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:19,274 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-09 11:06:19,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-09 11:06:19,274 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:19,274 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:19,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-09 11:06:19,475 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:19,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:19,476 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-09 11:06:19,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:19,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705920571] [2020-10-09 11:06:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:19,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705920571] [2020-10-09 11:06:19,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616648818] [2020-10-09 11:06:19,625 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 [2020-10-09 11:06:19,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-09 11:06:19,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:19,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-09 11:06:19,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:19,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:06:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:19,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:19,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-09 11:06:19,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106177759] [2020-10-09 11:06:19,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:19,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:19,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:19,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:19,720 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-09 11:06:20,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:20,544 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-09 11:06:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:06:20,544 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-09 11:06:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:20,545 INFO L225 Difference]: With dead ends: 100 [2020-10-09 11:06:20,545 INFO L226 Difference]: Without dead ends: 95 [2020-10-09 11:06:20,545 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-09 11:06:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-09 11:06:20,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-09 11:06:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-09 11:06:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-09 11:06:20,547 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-09 11:06:20,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:20,547 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-09 11:06:20,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:20,547 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-09 11:06:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:20,548 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:20,548 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:20,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-09 11:06:20,749 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-09 11:06:20,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:20,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611487822] [2020-10-09 11:06:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:20,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611487822] [2020-10-09 11:06:20,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499771169] [2020-10-09 11:06:20,914 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 [2020-10-09 11:06:20,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:06:20,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:20,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:20,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:20,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:06:20,998 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:20,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:20,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-09 11:06:20,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918903473] [2020-10-09 11:06:20,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:20,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:20,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:21,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:21,000 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-09 11:06:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:21,873 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-09 11:06:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:06:21,873 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-09 11:06:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:21,874 INFO L225 Difference]: With dead ends: 84 [2020-10-09 11:06:21,874 INFO L226 Difference]: Without dead ends: 79 [2020-10-09 11:06:21,875 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-09 11:06:21,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-09 11:06:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-09 11:06:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-09 11:06:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-09 11:06:21,877 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-09 11:06:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:21,877 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-09 11:06:21,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-09 11:06:21,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:21,878 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:21,878 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:22,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-09 11:06:22,079 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:22,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:22,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-09 11:06:22,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:22,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029436092] [2020-10-09 11:06:22,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:22,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029436092] [2020-10-09 11:06:22,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819803817] [2020-10-09 11:06:22,296 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 [2020-10-09 11:06:22,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 11:06:22,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:22,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:22,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:22,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:22,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-09 11:06:22,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619445597] [2020-10-09 11:06:22,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:22,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:22,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:22,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:22,354 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-09 11:06:22,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:22,692 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-09 11:06:22,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 11:06:22,692 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-09 11:06:22,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:22,693 INFO L225 Difference]: With dead ends: 90 [2020-10-09 11:06:22,693 INFO L226 Difference]: Without dead ends: 84 [2020-10-09 11:06:22,693 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 11:06:22,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-09 11:06:22,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-09 11:06:22,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-09 11:06:22,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-09 11:06:22,695 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-09 11:06:22,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:22,695 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-09 11:06:22,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:22,696 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-09 11:06:22,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:22,696 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:22,696 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:22,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:22,897 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:22,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:22,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-09 11:06:22,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:22,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032862373] [2020-10-09 11:06:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:23,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032862373] [2020-10-09 11:06:23,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506719352] [2020-10-09 11:06:23,129 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 [2020-10-09 11:06:23,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-09 11:06:23,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:23,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:23,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:23,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:23,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:23,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-09 11:06:23,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154069830] [2020-10-09 11:06:23,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:23,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:23,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:23,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:23,209 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-09 11:06:23,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:23,630 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-09 11:06:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 11:06:23,631 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-09 11:06:23,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:23,632 INFO L225 Difference]: With dead ends: 106 [2020-10-09 11:06:23,632 INFO L226 Difference]: Without dead ends: 100 [2020-10-09 11:06:23,633 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 11:06:23,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-09 11:06:23,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-09 11:06:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-09 11:06:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-09 11:06:23,635 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-09 11:06:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:23,636 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-09 11:06:23,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-09 11:06:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:23,636 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:23,636 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:23,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-09 11:06:23,840 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:23,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:23,841 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-09 11:06:23,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:23,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73278991] [2020-10-09 11:06:23,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:24,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73278991] [2020-10-09 11:06:24,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369569396] [2020-10-09 11:06:24,056 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 [2020-10-09 11:06:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:24,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:24,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:24,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:24,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-09 11:06:24,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447016750] [2020-10-09 11:06:24,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:24,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:24,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:24,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:24,113 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-09 11:06:24,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:24,574 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-09 11:06:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 11:06:24,575 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-09 11:06:24,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:24,576 INFO L225 Difference]: With dead ends: 107 [2020-10-09 11:06:24,576 INFO L226 Difference]: Without dead ends: 101 [2020-10-09 11:06:24,576 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 11:06:24,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-09 11:06:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-09 11:06:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-09 11:06:24,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-09 11:06:24,579 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-09 11:06:24,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:24,579 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-09 11:06:24,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:24,579 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-09 11:06:24,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:24,580 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:24,580 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:24,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-09 11:06:24,788 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:24,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:24,788 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-09 11:06:24,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:24,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628200184] [2020-10-09 11:06:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:25,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628200184] [2020-10-09 11:06:25,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714783733] [2020-10-09 11:06:25,022 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 [2020-10-09 11:06:25,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:06:25,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:25,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:25,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:25,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:25,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:25,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-09 11:06:25,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136979866] [2020-10-09 11:06:25,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:25,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:25,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:25,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:25,100 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-09 11:06:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:25,589 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-09 11:06:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 11:06:25,590 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-09 11:06:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:25,591 INFO L225 Difference]: With dead ends: 119 [2020-10-09 11:06:25,591 INFO L226 Difference]: Without dead ends: 113 [2020-10-09 11:06:25,591 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-09 11:06:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-09 11:06:25,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-09 11:06:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-09 11:06:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-09 11:06:25,593 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-09 11:06:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:25,593 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-09 11:06:25,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-09 11:06:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:25,593 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:25,593 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:25,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-09 11:06:25,794 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:25,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:25,795 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-09 11:06:25,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:25,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809127954] [2020-10-09 11:06:25,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:25,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809127954] [2020-10-09 11:06:25,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701318764] [2020-10-09 11:06:25,997 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 [2020-10-09 11:06:26,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-09 11:06:26,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:26,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:26,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:26,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:26,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-09 11:06:26,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021272997] [2020-10-09 11:06:26,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:26,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:26,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:26,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:26,060 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-09 11:06:26,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:26,564 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-09 11:06:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 11:06:26,565 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-09 11:06:26,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:26,565 INFO L225 Difference]: With dead ends: 119 [2020-10-09 11:06:26,565 INFO L226 Difference]: Without dead ends: 113 [2020-10-09 11:06:26,566 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 11:06:26,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-09 11:06:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-09 11:06:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-09 11:06:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-09 11:06:26,568 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-09 11:06:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:26,569 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-09 11:06:26,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-09 11:06:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:26,569 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:26,569 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:26,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:26,776 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:26,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:26,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-09 11:06:26,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:26,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437702169] [2020-10-09 11:06:26,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:27,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437702169] [2020-10-09 11:06:27,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031222658] [2020-10-09 11:06:27,016 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 [2020-10-09 11:06:27,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:06:27,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:27,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:27,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:27,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:27,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:27,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-09 11:06:27,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132140488] [2020-10-09 11:06:27,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:27,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:27,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:27,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:27,128 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-09 11:06:27,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:27,708 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-09 11:06:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 11:06:27,709 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-09 11:06:27,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:27,709 INFO L225 Difference]: With dead ends: 116 [2020-10-09 11:06:27,709 INFO L226 Difference]: Without dead ends: 110 [2020-10-09 11:06:27,710 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 11:06:27,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-09 11:06:27,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-09 11:06:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-09 11:06:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-09 11:06:27,711 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-09 11:06:27,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:27,711 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-09 11:06:27,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:27,711 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-09 11:06:27,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:27,712 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:27,712 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:27,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:27,917 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:27,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:27,918 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-09 11:06:27,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:27,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846929221] [2020-10-09 11:06:27,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:28,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846929221] [2020-10-09 11:06:28,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146944373] [2020-10-09 11:06:28,111 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 [2020-10-09 11:06:28,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 11:06:28,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:28,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:28,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:28,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:28,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-09 11:06:28,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084614275] [2020-10-09 11:06:28,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:28,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:28,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:28,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:28,182 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-09 11:06:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:28,742 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-09 11:06:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 11:06:28,745 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-09 11:06:28,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:28,746 INFO L225 Difference]: With dead ends: 117 [2020-10-09 11:06:28,746 INFO L226 Difference]: Without dead ends: 111 [2020-10-09 11:06:28,746 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-09 11:06:28,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-09 11:06:28,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-09 11:06:28,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-09 11:06:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-09 11:06:28,748 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-09 11:06:28,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:28,748 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-09 11:06:28,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:28,749 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-09 11:06:28,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:28,749 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:28,749 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:28,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:28,950 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:28,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:28,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-09 11:06:28,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:28,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173060504] [2020-10-09 11:06:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:29,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173060504] [2020-10-09 11:06:29,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465171391] [2020-10-09 11:06:29,147 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 [2020-10-09 11:06:29,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-09 11:06:29,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:29,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:29,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:29,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:29,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:29,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-09 11:06:29,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644190681] [2020-10-09 11:06:29,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:29,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:29,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:29,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:29,239 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-09 11:06:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:29,898 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-09 11:06:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 11:06:29,899 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-09 11:06:29,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:29,899 INFO L225 Difference]: With dead ends: 114 [2020-10-09 11:06:29,899 INFO L226 Difference]: Without dead ends: 108 [2020-10-09 11:06:29,900 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-09 11:06:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-09 11:06:29,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-09 11:06:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-09 11:06:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-09 11:06:29,902 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-09 11:06:29,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:29,902 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-09 11:06:29,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:29,902 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-09 11:06:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:29,903 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:29,903 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:30,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-09 11:06:30,105 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:30,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-09 11:06:30,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:30,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135765766] [2020-10-09 11:06:30,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:30,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135765766] [2020-10-09 11:06:30,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092164073] [2020-10-09 11:06:30,301 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 [2020-10-09 11:06:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:30,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:30,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:30,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:30,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-09 11:06:30,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360858836] [2020-10-09 11:06:30,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:30,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:30,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:30,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:30,370 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-09 11:06:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:30,972 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-09 11:06:30,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 11:06:30,973 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-09 11:06:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:30,973 INFO L225 Difference]: With dead ends: 115 [2020-10-09 11:06:30,973 INFO L226 Difference]: Without dead ends: 109 [2020-10-09 11:06:30,974 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 11:06:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-09 11:06:30,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-09 11:06:30,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-09 11:06:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-09 11:06:30,976 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-09 11:06:30,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:30,977 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-09 11:06:30,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:30,977 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-09 11:06:30,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:30,977 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:30,977 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:31,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:31,186 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:31,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:31,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-09 11:06:31,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:31,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270015723] [2020-10-09 11:06:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:31,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270015723] [2020-10-09 11:06:31,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42722612] [2020-10-09 11:06:31,371 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 [2020-10-09 11:06:31,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:06:31,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:31,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:31,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:31,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:31,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:31,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-09 11:06:31,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274226182] [2020-10-09 11:06:31,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:31,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:31,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:31,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:31,450 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-09 11:06:32,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:32,188 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-09 11:06:32,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 11:06:32,188 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-09 11:06:32,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:32,188 INFO L225 Difference]: With dead ends: 112 [2020-10-09 11:06:32,189 INFO L226 Difference]: Without dead ends: 106 [2020-10-09 11:06:32,189 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-09 11:06:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-09 11:06:32,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-09 11:06:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-09 11:06:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-09 11:06:32,191 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-09 11:06:32,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:32,191 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-09 11:06:32,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:32,191 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-09 11:06:32,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:32,192 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:32,192 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:32,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-09 11:06:32,392 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:32,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:32,393 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-09 11:06:32,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:32,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635096558] [2020-10-09 11:06:32,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:32,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635096558] [2020-10-09 11:06:32,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885413981] [2020-10-09 11:06:32,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:06:32,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-09 11:06:32,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:32,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:32,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:32,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:32,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-09 11:06:32,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538846515] [2020-10-09 11:06:32,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:32,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:32,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:32,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:32,632 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-09 11:06:33,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:33,294 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-09 11:06:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:06:33,294 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-09 11:06:33,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:33,295 INFO L225 Difference]: With dead ends: 113 [2020-10-09 11:06:33,295 INFO L226 Difference]: Without dead ends: 107 [2020-10-09 11:06:33,295 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-09 11:06:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-09 11:06:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-09 11:06:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-09 11:06:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-09 11:06:33,297 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-09 11:06:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:33,298 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-09 11:06:33,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-09 11:06:33,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:33,298 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:33,298 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:33,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-09 11:06:33,499 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:33,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-09 11:06:33,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:33,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153312536] [2020-10-09 11:06:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:33,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153312536] [2020-10-09 11:06:33,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016981192] [2020-10-09 11:06:33,683 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 [2020-10-09 11:06:33,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:06:33,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:33,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:33,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:33,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:33,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:33,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-09 11:06:33,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779632870] [2020-10-09 11:06:33,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:33,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:33,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:33,765 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-09 11:06:34,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:34,582 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-09 11:06:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 11:06:34,583 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-09 11:06:34,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:34,584 INFO L225 Difference]: With dead ends: 110 [2020-10-09 11:06:34,584 INFO L226 Difference]: Without dead ends: 104 [2020-10-09 11:06:34,584 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-09 11:06:34,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-09 11:06:34,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-09 11:06:34,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-09 11:06:34,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-09 11:06:34,586 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-09 11:06:34,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:34,586 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-09 11:06:34,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:34,587 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-09 11:06:34,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:34,587 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:34,587 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:34,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-09 11:06:34,788 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:34,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:34,788 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-09 11:06:34,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:34,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017490215] [2020-10-09 11:06:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:34,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017490215] [2020-10-09 11:06:34,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098281105] [2020-10-09 11:06:34,962 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 [2020-10-09 11:06:35,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 11:06:35,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:35,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:35,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:35,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:35,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-09 11:06:35,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032384487] [2020-10-09 11:06:35,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:35,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:35,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:35,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:35,043 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-09 11:06:35,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:35,820 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-09 11:06:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-09 11:06:35,821 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-09 11:06:35,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:35,821 INFO L225 Difference]: With dead ends: 111 [2020-10-09 11:06:35,821 INFO L226 Difference]: Without dead ends: 105 [2020-10-09 11:06:35,822 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-09 11:06:35,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-09 11:06:35,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-09 11:06:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-09 11:06:35,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-09 11:06:35,824 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-09 11:06:35,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:35,824 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-09 11:06:35,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:35,825 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-09 11:06:35,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:35,825 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:35,825 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:36,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:36,026 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:36,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:36,026 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-09 11:06:36,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:36,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24031230] [2020-10-09 11:06:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:36,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24031230] [2020-10-09 11:06:36,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623018221] [2020-10-09 11:06:36,201 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 [2020-10-09 11:06:36,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-09 11:06:36,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:36,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:36,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:36,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:36,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:36,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-09 11:06:36,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736154282] [2020-10-09 11:06:36,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:36,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:36,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:36,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:36,287 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-09 11:06:37,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:37,187 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-09 11:06:37,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 11:06:37,188 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-09 11:06:37,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:37,189 INFO L225 Difference]: With dead ends: 108 [2020-10-09 11:06:37,189 INFO L226 Difference]: Without dead ends: 102 [2020-10-09 11:06:37,189 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-09 11:06:37,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-09 11:06:37,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-09 11:06:37,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-09 11:06:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-09 11:06:37,191 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-09 11:06:37,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:37,192 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-09 11:06:37,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:37,192 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-09 11:06:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:37,192 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:37,192 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:37,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-09 11:06:37,393 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:37,394 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-09 11:06:37,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:37,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113137584] [2020-10-09 11:06:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:37,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113137584] [2020-10-09 11:06:37,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716172565] [2020-10-09 11:06:37,564 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 [2020-10-09 11:06:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:37,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:37,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:37,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:37,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-09 11:06:37,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854684086] [2020-10-09 11:06:37,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-09 11:06:37,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:37,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-09 11:06:37,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-09 11:06:37,630 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-09 11:06:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:38,398 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-09 11:06:38,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 11:06:38,400 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-09 11:06:38,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:38,401 INFO L225 Difference]: With dead ends: 128 [2020-10-09 11:06:38,401 INFO L226 Difference]: Without dead ends: 122 [2020-10-09 11:06:38,401 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-09 11:06:38,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-09 11:06:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-09 11:06:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-09 11:06:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-09 11:06:38,403 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-09 11:06:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:38,403 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-09 11:06:38,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-09 11:06:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-09 11:06:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 11:06:38,403 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:38,403 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:38,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:38,604 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:38,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:38,605 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-09 11:06:38,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:38,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304034141] [2020-10-09 11:06:38,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:38,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304034141] [2020-10-09 11:06:38,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76585955] [2020-10-09 11:06:38,775 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 [2020-10-09 11:06:38,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:06:38,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:38,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-09 11:06:38,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:38,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:38,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:38,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-09 11:06:38,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721820411] [2020-10-09 11:06:38,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:38,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:38,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:38,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:38,857 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-09 11:06:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:39,802 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-09 11:06:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 11:06:39,802 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-09 11:06:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:39,803 INFO L225 Difference]: With dead ends: 109 [2020-10-09 11:06:39,803 INFO L226 Difference]: Without dead ends: 101 [2020-10-09 11:06:39,804 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-09 11:06:39,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-09 11:06:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-09 11:06:39,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-09 11:06:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-09 11:06:39,806 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-09 11:06:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:39,806 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-09 11:06:39,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:39,807 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-09 11:06:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:39,807 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:39,807 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:40,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:40,010 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:40,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:40,010 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-09 11:06:40,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:40,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840821782] [2020-10-09 11:06:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:40,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840821782] [2020-10-09 11:06:40,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096684357] [2020-10-09 11:06:40,273 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 [2020-10-09 11:06:40,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-09 11:06:40,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:40,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:40,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:40,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:40,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-09 11:06:40,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715943822] [2020-10-09 11:06:40,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:40,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:40,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:40,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:40,336 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-09 11:06:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:40,772 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-09 11:06:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 11:06:40,773 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-09 11:06:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:40,774 INFO L225 Difference]: With dead ends: 124 [2020-10-09 11:06:40,774 INFO L226 Difference]: Without dead ends: 118 [2020-10-09 11:06:40,774 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 11:06:40,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-09 11:06:40,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-09 11:06:40,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-09 11:06:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-09 11:06:40,777 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-09 11:06:40,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:40,777 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-09 11:06:40,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-09 11:06:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:40,778 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:40,778 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:40,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:40,983 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:40,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:40,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-09 11:06:40,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:40,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613433244] [2020-10-09 11:06:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:41,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613433244] [2020-10-09 11:06:41,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305585541] [2020-10-09 11:06:41,239 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 [2020-10-09 11:06:41,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:06:41,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:41,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:41,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:41,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:41,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:41,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-09 11:06:41,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075558209] [2020-10-09 11:06:41,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:06:41,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:41,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:06:41,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:06:41,319 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-09 11:06:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:41,814 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-09 11:06:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 11:06:41,815 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-09 11:06:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:41,816 INFO L225 Difference]: With dead ends: 121 [2020-10-09 11:06:41,816 INFO L226 Difference]: Without dead ends: 115 [2020-10-09 11:06:41,816 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 11:06:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-09 11:06:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-09 11:06:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-09 11:06:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-09 11:06:41,818 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-09 11:06:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:41,818 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-09 11:06:41,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:06:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-09 11:06:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:41,819 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:41,819 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:42,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:42,025 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:42,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:42,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-09 11:06:42,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:42,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930183438] [2020-10-09 11:06:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:42,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930183438] [2020-10-09 11:06:42,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092588965] [2020-10-09 11:06:42,264 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 [2020-10-09 11:06:42,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 11:06:42,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:42,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:42,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:42,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:42,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-09 11:06:42,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929604059] [2020-10-09 11:06:42,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:42,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:42,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:42,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:42,337 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-09 11:06:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:42,824 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-09 11:06:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 11:06:42,825 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-09 11:06:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:42,826 INFO L225 Difference]: With dead ends: 118 [2020-10-09 11:06:42,826 INFO L226 Difference]: Without dead ends: 112 [2020-10-09 11:06:42,826 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-09 11:06:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-09 11:06:42,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-09 11:06:42,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-09 11:06:42,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-09 11:06:42,829 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-09 11:06:42,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:42,829 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-09 11:06:42,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:42,829 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-09 11:06:42,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:42,830 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:42,830 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:43,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:43,030 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:43,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:43,031 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-09 11:06:43,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:43,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591272623] [2020-10-09 11:06:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:43,262 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:43,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591272623] [2020-10-09 11:06:43,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42544924] [2020-10-09 11:06:43,263 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 [2020-10-09 11:06:43,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-09 11:06:43,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:43,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:43,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:43,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:43,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:43,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-09 11:06:43,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375153414] [2020-10-09 11:06:43,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:06:43,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:43,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:06:43,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:06:43,348 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-09 11:06:43,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:43,957 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-09 11:06:43,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 11:06:43,958 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-09 11:06:43,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:43,959 INFO L225 Difference]: With dead ends: 117 [2020-10-09 11:06:43,959 INFO L226 Difference]: Without dead ends: 111 [2020-10-09 11:06:43,959 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-09 11:06:43,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-09 11:06:43,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-09 11:06:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-09 11:06:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-09 11:06:43,961 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-09 11:06:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:43,961 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-09 11:06:43,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:06:43,961 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-09 11:06:43,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:43,962 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:43,962 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:44,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-09 11:06:44,163 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:44,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:44,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-09 11:06:44,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:44,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121001105] [2020-10-09 11:06:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:44,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121001105] [2020-10-09 11:06:44,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810220104] [2020-10-09 11:06:44,396 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 [2020-10-09 11:06:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:44,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:44,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:44,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:44,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-09 11:06:44,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084608194] [2020-10-09 11:06:44,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:44,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:44,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:44,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:44,456 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-09 11:06:45,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:45,008 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-09 11:06:45,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 11:06:45,009 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-09 11:06:45,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:45,009 INFO L225 Difference]: With dead ends: 114 [2020-10-09 11:06:45,009 INFO L226 Difference]: Without dead ends: 108 [2020-10-09 11:06:45,010 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 11:06:45,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-09 11:06:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-09 11:06:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-09 11:06:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-09 11:06:45,012 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-09 11:06:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:45,012 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-09 11:06:45,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-09 11:06:45,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:45,012 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:45,013 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:45,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-09 11:06:45,216 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:45,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:45,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-09 11:06:45,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:45,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767838111] [2020-10-09 11:06:45,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:45,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767838111] [2020-10-09 11:06:45,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21007912] [2020-10-09 11:06:45,443 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 [2020-10-09 11:06:45,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:06:45,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:45,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:45,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:45,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:45,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:45,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-09 11:06:45,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340759070] [2020-10-09 11:06:45,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:06:45,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:45,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:06:45,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:06:45,522 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-09 11:06:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:46,224 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-09 11:06:46,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 11:06:46,225 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-09 11:06:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:46,225 INFO L225 Difference]: With dead ends: 113 [2020-10-09 11:06:46,225 INFO L226 Difference]: Without dead ends: 107 [2020-10-09 11:06:46,226 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 11:06:46,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-09 11:06:46,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-09 11:06:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-09 11:06:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-09 11:06:46,228 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-09 11:06:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:46,228 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-09 11:06:46,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:06:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-09 11:06:46,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:46,229 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:46,229 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:46,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-09 11:06:46,437 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:46,438 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-09 11:06:46,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:46,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425498100] [2020-10-09 11:06:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:46,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425498100] [2020-10-09 11:06:46,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465647179] [2020-10-09 11:06:46,649 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 [2020-10-09 11:06:46,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-09 11:06:46,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:46,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:46,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:46,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:46,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-09 11:06:46,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252545890] [2020-10-09 11:06:46,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:46,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:46,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:46,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:46,725 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-09 11:06:47,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:47,339 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-09 11:06:47,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 11:06:47,340 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-09 11:06:47,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:47,341 INFO L225 Difference]: With dead ends: 110 [2020-10-09 11:06:47,341 INFO L226 Difference]: Without dead ends: 104 [2020-10-09 11:06:47,341 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-09 11:06:47,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-09 11:06:47,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-09 11:06:47,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-09 11:06:47,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-09 11:06:47,343 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-09 11:06:47,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:47,344 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-09 11:06:47,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:47,344 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-09 11:06:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:47,344 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:47,344 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:47,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-09 11:06:47,545 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:47,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:47,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-09 11:06:47,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:47,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427993888] [2020-10-09 11:06:47,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:47,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427993888] [2020-10-09 11:06:47,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794026217] [2020-10-09 11:06:47,760 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 [2020-10-09 11:06:47,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:06:47,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:47,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:47,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:47,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:47,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:47,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-09 11:06:47,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323267233] [2020-10-09 11:06:47,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:06:47,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:47,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:06:47,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:06:47,849 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-09 11:06:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:48,626 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-09 11:06:48,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 11:06:48,627 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-09 11:06:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:48,628 INFO L225 Difference]: With dead ends: 109 [2020-10-09 11:06:48,628 INFO L226 Difference]: Without dead ends: 103 [2020-10-09 11:06:48,628 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-09 11:06:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-09 11:06:48,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-09 11:06:48,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-09 11:06:48,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-09 11:06:48,630 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-09 11:06:48,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:48,631 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-09 11:06:48,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:06:48,631 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-09 11:06:48,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:48,631 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:48,631 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:48,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:48,832 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:48,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:48,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-09 11:06:48,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:48,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391046987] [2020-10-09 11:06:48,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:49,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391046987] [2020-10-09 11:06:49,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406886566] [2020-10-09 11:06:49,047 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 [2020-10-09 11:06:49,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 11:06:49,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:49,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:49,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:49,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:49,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-09 11:06:49,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109818014] [2020-10-09 11:06:49,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:49,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:49,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:49,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:49,112 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-09 11:06:49,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:49,780 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-09 11:06:49,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 11:06:49,780 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-09 11:06:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:49,781 INFO L225 Difference]: With dead ends: 106 [2020-10-09 11:06:49,781 INFO L226 Difference]: Without dead ends: 100 [2020-10-09 11:06:49,781 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-09 11:06:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-09 11:06:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-09 11:06:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-09 11:06:49,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-09 11:06:49,783 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-09 11:06:49,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:49,784 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-09 11:06:49,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:49,784 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-09 11:06:49,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:49,784 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:49,784 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:49,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-09 11:06:49,985 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:49,986 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-09 11:06:49,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:49,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410327902] [2020-10-09 11:06:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:50,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410327902] [2020-10-09 11:06:50,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157378160] [2020-10-09 11:06:50,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:06:50,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-09 11:06:50,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:50,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:50,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:50,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:50,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:50,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-09 11:06:50,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570474055] [2020-10-09 11:06:50,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:06:50,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:50,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:06:50,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:06:50,283 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-09 11:06:51,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:51,163 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-09 11:06:51,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 11:06:51,164 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-09 11:06:51,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:51,165 INFO L225 Difference]: With dead ends: 105 [2020-10-09 11:06:51,165 INFO L226 Difference]: Without dead ends: 99 [2020-10-09 11:06:51,165 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-09 11:06:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-09 11:06:51,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-09 11:06:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-09 11:06:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-09 11:06:51,168 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-09 11:06:51,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:51,168 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-09 11:06:51,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:06:51,168 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-09 11:06:51,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:51,169 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:51,169 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:51,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:51,369 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:51,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:51,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-09 11:06:51,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:51,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385205460] [2020-10-09 11:06:51,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:51,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385205460] [2020-10-09 11:06:51,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2688858] [2020-10-09 11:06:51,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:06:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:51,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:51,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:51,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:51,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-09 11:06:51,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156375575] [2020-10-09 11:06:51,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:51,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:51,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:51,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:51,624 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-09 11:06:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:52,364 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-09 11:06:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:06:52,365 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-09 11:06:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:52,365 INFO L225 Difference]: With dead ends: 102 [2020-10-09 11:06:52,365 INFO L226 Difference]: Without dead ends: 96 [2020-10-09 11:06:52,365 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-09 11:06:52,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-09 11:06:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-09 11:06:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-09 11:06:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-09 11:06:52,367 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-09 11:06:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:52,367 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-09 11:06:52,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-09 11:06:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:52,368 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:52,368 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:52,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:52,569 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:52,569 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-09 11:06:52,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:52,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291849370] [2020-10-09 11:06:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:52,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291849370] [2020-10-09 11:06:52,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432411853] [2020-10-09 11:06:52,776 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 [2020-10-09 11:06:52,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:06:52,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:52,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:52,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:52,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:52,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:52,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-09 11:06:52,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653678790] [2020-10-09 11:06:52,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:06:52,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:52,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:06:52,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:06:52,859 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-09 11:06:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:53,826 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-09 11:06:53,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 11:06:53,827 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-09 11:06:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:53,827 INFO L225 Difference]: With dead ends: 101 [2020-10-09 11:06:53,827 INFO L226 Difference]: Without dead ends: 95 [2020-10-09 11:06:53,828 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-09 11:06:53,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-09 11:06:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-09 11:06:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-09 11:06:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-09 11:06:53,830 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-09 11:06:53,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:53,830 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-09 11:06:53,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:06:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-09 11:06:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:53,831 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:53,831 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:54,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-09 11:06:54,032 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:54,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:54,032 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-09 11:06:54,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:54,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633056283] [2020-10-09 11:06:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:54,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633056283] [2020-10-09 11:06:54,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733029221] [2020-10-09 11:06:54,229 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 [2020-10-09 11:06:54,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-09 11:06:54,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:54,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:54,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:54,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:54,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-09 11:06:54,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641646323] [2020-10-09 11:06:54,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:54,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:54,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:54,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:54,302 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-09 11:06:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:55,098 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-09 11:06:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-09 11:06:55,099 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-09 11:06:55,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:55,100 INFO L225 Difference]: With dead ends: 98 [2020-10-09 11:06:55,100 INFO L226 Difference]: Without dead ends: 92 [2020-10-09 11:06:55,100 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-09 11:06:55,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-09 11:06:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-09 11:06:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-09 11:06:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-09 11:06:55,102 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-09 11:06:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:55,102 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-09 11:06:55,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-09 11:06:55,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:55,103 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:55,103 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:55,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:06:55,305 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:55,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:55,305 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-09 11:06:55,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:55,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463901008] [2020-10-09 11:06:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:55,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463901008] [2020-10-09 11:06:55,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464044588] [2020-10-09 11:06:55,500 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 [2020-10-09 11:06:55,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:06:55,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:55,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:55,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:55,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:06:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:55,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:55,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-09 11:06:55,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889822837] [2020-10-09 11:06:55,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:06:55,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:55,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:06:55,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:06:55,585 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-09 11:06:56,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:56,652 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-09 11:06:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 11:06:56,653 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-09 11:06:56,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:56,654 INFO L225 Difference]: With dead ends: 97 [2020-10-09 11:06:56,654 INFO L226 Difference]: Without dead ends: 91 [2020-10-09 11:06:56,654 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-09 11:06:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-09 11:06:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-09 11:06:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-09 11:06:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-09 11:06:56,656 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-09 11:06:56,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:56,656 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-09 11:06:56,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:06:56,656 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-09 11:06:56,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:56,657 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:56,657 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:56,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-09 11:06:56,858 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:56,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:56,858 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-09 11:06:56,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:56,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819960719] [2020-10-09 11:06:56,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:57,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819960719] [2020-10-09 11:06:57,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459436260] [2020-10-09 11:06:57,046 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 [2020-10-09 11:06:57,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 11:06:57,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:57,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:57,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:57,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:57,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-09 11:06:57,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753038954] [2020-10-09 11:06:57,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-09 11:06:57,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:57,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-09 11:06:57,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-09 11:06:57,116 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-09 11:06:57,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:57,971 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-09 11:06:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 11:06:57,972 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-09 11:06:57,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:57,973 INFO L225 Difference]: With dead ends: 113 [2020-10-09 11:06:57,973 INFO L226 Difference]: Without dead ends: 107 [2020-10-09 11:06:57,973 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-09 11:06:57,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-09 11:06:57,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-09 11:06:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-09 11:06:57,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-09 11:06:57,976 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-09 11:06:57,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:57,976 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-09 11:06:57,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-09 11:06:57,976 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-09 11:06:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:57,977 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:57,977 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:58,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-09 11:06:58,177 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:58,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:58,178 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-09 11:06:58,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:58,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208329367] [2020-10-09 11:06:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:58,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208329367] [2020-10-09 11:06:58,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044167853] [2020-10-09 11:06:58,379 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 [2020-10-09 11:06:58,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-09 11:06:58,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:06:58,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:06:58,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:58,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:58,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-09 11:06:58,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671788327] [2020-10-09 11:06:58,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:06:58,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:58,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:06:58,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:06:58,487 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-09 11:06:59,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:06:59,480 INFO L93 Difference]: Finished difference Result 92 states and 229 transitions. [2020-10-09 11:06:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 11:06:59,481 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-09 11:06:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:06:59,481 INFO L225 Difference]: With dead ends: 92 [2020-10-09 11:06:59,481 INFO L226 Difference]: Without dead ends: 84 [2020-10-09 11:06:59,482 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-10-09 11:06:59,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-09 11:06:59,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-10-09 11:06:59,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-09 11:06:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-09 11:06:59,484 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-09 11:06:59,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:06:59,484 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-09 11:06:59,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:06:59,484 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-09 11:06:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 11:06:59,484 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:06:59,484 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:06:59,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-09 11:06:59,685 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:06:59,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:06:59,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-09 11:06:59,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:06:59,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771332863] [2020-10-09 11:06:59,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:06:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:59,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771332863] [2020-10-09 11:06:59,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50256348] [2020-10-09 11:06:59,875 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 [2020-10-09 11:06:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:06:59,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 11:06:59,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:06:59,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:06:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:06:59,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:06:59,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-09 11:06:59,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655859232] [2020-10-09 11:06:59,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:06:59,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:06:59,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:06:59,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:06:59,966 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-09 11:07:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:00,978 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-09 11:07:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 11:07:00,979 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-09 11:07:00,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:00,980 INFO L225 Difference]: With dead ends: 108 [2020-10-09 11:07:00,980 INFO L226 Difference]: Without dead ends: 103 [2020-10-09 11:07:00,980 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-09 11:07:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-09 11:07:00,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-09 11:07:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-09 11:07:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-09 11:07:00,982 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-09 11:07:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:00,983 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-09 11:07:00,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:07:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-09 11:07:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:00,983 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:00,983 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:01,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-09 11:07:01,184 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:01,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:01,185 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-09 11:07:01,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:01,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219450001] [2020-10-09 11:07:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:01,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219450001] [2020-10-09 11:07:01,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486937279] [2020-10-09 11:07:01,398 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 [2020-10-09 11:07:01,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:07:01,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:01,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:01,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:01,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:07:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:01,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:01,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-09 11:07:01,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67915355] [2020-10-09 11:07:01,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:01,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:01,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:01,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:01,491 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-09 11:07:02,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:02,598 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-09 11:07:02,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 11:07:02,599 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-09 11:07:02,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:02,599 INFO L225 Difference]: With dead ends: 90 [2020-10-09 11:07:02,599 INFO L226 Difference]: Without dead ends: 85 [2020-10-09 11:07:02,600 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-09 11:07:02,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-09 11:07:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-09 11:07:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-09 11:07:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-09 11:07:02,601 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-09 11:07:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:02,602 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-09 11:07:02,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-09 11:07:02,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:02,602 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:02,602 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:02,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:02,805 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:02,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:02,805 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-09 11:07:02,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:02,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501278395] [2020-10-09 11:07:02,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:02,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:03,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501278395] [2020-10-09 11:07:03,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647155783] [2020-10-09 11:07:03,090 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 [2020-10-09 11:07:03,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-09 11:07:03,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:03,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:03,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:03,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:03,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-09 11:07:03,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693759078] [2020-10-09 11:07:03,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:07:03,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:03,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:07:03,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:07:03,152 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-09 11:07:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:03,597 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-09 11:07:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 11:07:03,598 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-09 11:07:03,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:03,598 INFO L225 Difference]: With dead ends: 96 [2020-10-09 11:07:03,598 INFO L226 Difference]: Without dead ends: 90 [2020-10-09 11:07:03,599 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 11:07:03,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-09 11:07:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-09 11:07:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-09 11:07:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-09 11:07:03,601 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-09 11:07:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:03,601 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-09 11:07:03,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:07:03,601 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-09 11:07:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:03,602 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:03,602 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:03,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:03,809 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:03,809 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-09 11:07:03,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:03,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442195505] [2020-10-09 11:07:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:04,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442195505] [2020-10-09 11:07:04,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043713799] [2020-10-09 11:07:04,101 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 [2020-10-09 11:07:04,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:07:04,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:04,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:04,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:04,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:04,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:04,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-09 11:07:04,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461544667] [2020-10-09 11:07:04,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:04,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:04,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:04,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:04,180 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-09 11:07:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:04,692 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-09 11:07:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 11:07:04,693 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-09 11:07:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:04,694 INFO L225 Difference]: With dead ends: 114 [2020-10-09 11:07:04,694 INFO L226 Difference]: Without dead ends: 108 [2020-10-09 11:07:04,694 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 11:07:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-09 11:07:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-09 11:07:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-09 11:07:04,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-09 11:07:04,696 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-09 11:07:04,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:04,697 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-09 11:07:04,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:04,697 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-09 11:07:04,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:04,697 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:04,697 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:04,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:04,898 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:04,899 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-09 11:07:04,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:04,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646581967] [2020-10-09 11:07:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:05,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646581967] [2020-10-09 11:07:05,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96122229] [2020-10-09 11:07:05,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:07:05,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-09 11:07:05,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:05,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:05,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:05,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:05,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-09 11:07:05,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617086593] [2020-10-09 11:07:05,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:07:05,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:05,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:07:05,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:07:05,244 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-09 11:07:05,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:05,795 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-09 11:07:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 11:07:05,796 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-09 11:07:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:05,796 INFO L225 Difference]: With dead ends: 115 [2020-10-09 11:07:05,796 INFO L226 Difference]: Without dead ends: 109 [2020-10-09 11:07:05,797 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 11:07:05,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-09 11:07:05,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-09 11:07:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-09 11:07:05,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-09 11:07:05,799 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-09 11:07:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:05,799 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-09 11:07:05,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:07:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-09 11:07:05,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:05,800 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:05,800 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:06,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:06,001 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:06,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-09 11:07:06,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:06,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021774800] [2020-10-09 11:07:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:06,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021774800] [2020-10-09 11:07:06,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161488179] [2020-10-09 11:07:06,285 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 [2020-10-09 11:07:06,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-09 11:07:06,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:06,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:06,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:06,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:06,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:06,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-09 11:07:06,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058757534] [2020-10-09 11:07:06,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:06,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:06,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:06,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:06,379 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-09 11:07:06,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:06,985 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-09 11:07:06,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 11:07:06,986 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-09 11:07:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:06,986 INFO L225 Difference]: With dead ends: 129 [2020-10-09 11:07:06,986 INFO L226 Difference]: Without dead ends: 123 [2020-10-09 11:07:06,987 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-09 11:07:06,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-09 11:07:06,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-09 11:07:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-09 11:07:06,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-09 11:07:06,989 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-09 11:07:06,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:06,990 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-09 11:07:06,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:06,990 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-09 11:07:06,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:06,990 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:06,990 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:07,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:07,191 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:07,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:07,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-09 11:07:07,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:07,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431349542] [2020-10-09 11:07:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:07,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431349542] [2020-10-09 11:07:07,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781320311] [2020-10-09 11:07:07,451 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 [2020-10-09 11:07:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:07,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:07,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:07,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:07,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-09 11:07:07,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087949705] [2020-10-09 11:07:07,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:07:07,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:07,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:07:07,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:07:07,509 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-09 11:07:08,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:08,104 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-09 11:07:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 11:07:08,105 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-09 11:07:08,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:08,106 INFO L225 Difference]: With dead ends: 129 [2020-10-09 11:07:08,106 INFO L226 Difference]: Without dead ends: 123 [2020-10-09 11:07:08,106 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 11:07:08,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-09 11:07:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-09 11:07:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-09 11:07:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-09 11:07:08,108 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-09 11:07:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:08,109 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-09 11:07:08,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:07:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-09 11:07:08,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:08,109 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:08,109 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:08,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:08,314 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-09 11:07:08,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:08,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319680115] [2020-10-09 11:07:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:08,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319680115] [2020-10-09 11:07:08,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093199121] [2020-10-09 11:07:08,574 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 [2020-10-09 11:07:08,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:07:08,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:08,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:08,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:08,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:08,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:08,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-09 11:07:08,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388991795] [2020-10-09 11:07:08,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:08,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:08,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:08,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:08,660 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-09 11:07:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:09,347 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-09 11:07:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 11:07:09,348 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-09 11:07:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:09,349 INFO L225 Difference]: With dead ends: 126 [2020-10-09 11:07:09,349 INFO L226 Difference]: Without dead ends: 120 [2020-10-09 11:07:09,350 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-09 11:07:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-09 11:07:09,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-09 11:07:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-09 11:07:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-09 11:07:09,352 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-09 11:07:09,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:09,352 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-09 11:07:09,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:09,353 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-09 11:07:09,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:09,353 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:09,353 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:09,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:09,555 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:09,555 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-09 11:07:09,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:09,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707044347] [2020-10-09 11:07:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:09,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707044347] [2020-10-09 11:07:09,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931493498] [2020-10-09 11:07:09,808 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 [2020-10-09 11:07:09,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-09 11:07:09,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:09,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:09,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:09,876 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:09,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:09,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-09 11:07:09,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039351026] [2020-10-09 11:07:09,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:07:09,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:09,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:07:09,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:07:09,877 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-09 11:07:10,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:10,544 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-09 11:07:10,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 11:07:10,545 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-09 11:07:10,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:10,545 INFO L225 Difference]: With dead ends: 127 [2020-10-09 11:07:10,545 INFO L226 Difference]: Without dead ends: 121 [2020-10-09 11:07:10,546 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-09 11:07:10,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-09 11:07:10,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-09 11:07:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-09 11:07:10,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-09 11:07:10,548 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-09 11:07:10,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:10,548 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-09 11:07:10,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:07:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-09 11:07:10,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:10,549 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:10,549 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:10,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-09 11:07:10,750 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:10,750 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-09 11:07:10,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:10,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112260794] [2020-10-09 11:07:10,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:11,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112260794] [2020-10-09 11:07:11,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399996904] [2020-10-09 11:07:11,012 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 [2020-10-09 11:07:11,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:07:11,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:11,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:11,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:11,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:11,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:11,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-09 11:07:11,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19440495] [2020-10-09 11:07:11,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:11,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:11,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:11,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:11,098 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-09 11:07:11,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:11,880 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-09 11:07:11,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 11:07:11,881 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-09 11:07:11,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:11,881 INFO L225 Difference]: With dead ends: 124 [2020-10-09 11:07:11,881 INFO L226 Difference]: Without dead ends: 118 [2020-10-09 11:07:11,882 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-09 11:07:11,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-09 11:07:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-09 11:07:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-09 11:07:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-09 11:07:11,883 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-09 11:07:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:11,883 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-09 11:07:11,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:11,883 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-09 11:07:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:11,883 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:11,884 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:12,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-09 11:07:12,084 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:12,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:12,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-09 11:07:12,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:12,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532158551] [2020-10-09 11:07:12,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:12,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532158551] [2020-10-09 11:07:12,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580804449] [2020-10-09 11:07:12,338 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 [2020-10-09 11:07:12,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-09 11:07:12,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:12,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:12,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:12,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:12,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-09 11:07:12,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640125300] [2020-10-09 11:07:12,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:07:12,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:12,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:07:12,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:07:12,431 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-09 11:07:13,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:13,188 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-09 11:07:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:07:13,189 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-09 11:07:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:13,189 INFO L225 Difference]: With dead ends: 125 [2020-10-09 11:07:13,189 INFO L226 Difference]: Without dead ends: 119 [2020-10-09 11:07:13,190 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-09 11:07:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-09 11:07:13,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-09 11:07:13,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-09 11:07:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-09 11:07:13,192 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-09 11:07:13,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:13,192 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-09 11:07:13,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:07:13,192 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-09 11:07:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:13,193 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:13,193 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:13,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-09 11:07:13,394 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:13,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:13,394 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-09 11:07:13,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:13,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790943723] [2020-10-09 11:07:13,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:13,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790943723] [2020-10-09 11:07:13,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476252124] [2020-10-09 11:07:13,635 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 [2020-10-09 11:07:13,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-09 11:07:13,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:13,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:13,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:13,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:13,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:13,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-09 11:07:13,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337099540] [2020-10-09 11:07:13,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:13,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:13,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:13,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:13,736 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-09 11:07:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:14,626 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-09 11:07:14,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 11:07:14,627 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-09 11:07:14,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:14,628 INFO L225 Difference]: With dead ends: 122 [2020-10-09 11:07:14,628 INFO L226 Difference]: Without dead ends: 116 [2020-10-09 11:07:14,629 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-09 11:07:14,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-09 11:07:14,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-09 11:07:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-09 11:07:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-09 11:07:14,631 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-09 11:07:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:14,631 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-09 11:07:14,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:14,631 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-09 11:07:14,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:14,631 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:14,631 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:14,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-09 11:07:14,832 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:14,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:14,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-09 11:07:14,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:14,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154981448] [2020-10-09 11:07:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:15,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154981448] [2020-10-09 11:07:15,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540226899] [2020-10-09 11:07:15,070 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 [2020-10-09 11:07:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:15,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:15,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:15,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:15,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-09 11:07:15,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9440306] [2020-10-09 11:07:15,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:07:15,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:15,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:07:15,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:07:15,135 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-09 11:07:15,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:15,936 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-09 11:07:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-09 11:07:15,938 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-09 11:07:15,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:15,939 INFO L225 Difference]: With dead ends: 123 [2020-10-09 11:07:15,939 INFO L226 Difference]: Without dead ends: 117 [2020-10-09 11:07:15,939 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-09 11:07:15,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-09 11:07:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-09 11:07:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-09 11:07:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-09 11:07:15,941 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-09 11:07:15,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:15,941 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-09 11:07:15,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:07:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-09 11:07:15,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:15,942 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:15,942 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:16,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:16,143 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:16,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-09 11:07:16,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:16,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549014846] [2020-10-09 11:07:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:16,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549014846] [2020-10-09 11:07:16,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088355438] [2020-10-09 11:07:16,376 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 [2020-10-09 11:07:16,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:07:16,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:16,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:16,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:16,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:16,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:16,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-09 11:07:16,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575914826] [2020-10-09 11:07:16,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:16,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:16,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:16,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:16,464 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-09 11:07:17,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:17,429 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-09 11:07:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 11:07:17,430 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-09 11:07:17,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:17,431 INFO L225 Difference]: With dead ends: 120 [2020-10-09 11:07:17,431 INFO L226 Difference]: Without dead ends: 114 [2020-10-09 11:07:17,432 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-09 11:07:17,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-09 11:07:17,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-09 11:07:17,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-09 11:07:17,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-09 11:07:17,433 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-09 11:07:17,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:17,434 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-09 11:07:17,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:17,434 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-09 11:07:17,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:17,434 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:17,434 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:17,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:17,635 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:17,635 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-09 11:07:17,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:17,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851777813] [2020-10-09 11:07:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:17,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851777813] [2020-10-09 11:07:17,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074918903] [2020-10-09 11:07:17,875 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 [2020-10-09 11:07:17,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-09 11:07:17,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:17,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:17,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:17,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:17,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-09 11:07:17,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364315120] [2020-10-09 11:07:17,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:07:17,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:17,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:07:17,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:07:17,948 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-09 11:07:18,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:18,823 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-09 11:07:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 11:07:18,824 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-09 11:07:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:18,825 INFO L225 Difference]: With dead ends: 121 [2020-10-09 11:07:18,825 INFO L226 Difference]: Without dead ends: 115 [2020-10-09 11:07:18,825 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-09 11:07:18,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-09 11:07:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-09 11:07:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-09 11:07:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-09 11:07:18,826 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-09 11:07:18,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:18,827 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-09 11:07:18,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:07:18,827 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-09 11:07:18,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:18,827 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:18,827 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:19,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-09 11:07:19,028 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:19,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-09 11:07:19,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:19,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143351617] [2020-10-09 11:07:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:19,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143351617] [2020-10-09 11:07:19,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844918115] [2020-10-09 11:07:19,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:07:19,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:07:19,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:19,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:19,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:19,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:19,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:19,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-09 11:07:19,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87551141] [2020-10-09 11:07:19,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:19,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:19,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:19,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:19,354 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-09 11:07:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:20,529 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-09 11:07:20,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 11:07:20,530 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-09 11:07:20,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:20,530 INFO L225 Difference]: With dead ends: 118 [2020-10-09 11:07:20,530 INFO L226 Difference]: Without dead ends: 112 [2020-10-09 11:07:20,530 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-09 11:07:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-09 11:07:20,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-09 11:07:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-09 11:07:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-09 11:07:20,532 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-09 11:07:20,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:20,532 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-09 11:07:20,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:20,532 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-09 11:07:20,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:20,532 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:20,532 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:20,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:20,733 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:20,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:20,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-09 11:07:20,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:20,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040132948] [2020-10-09 11:07:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:20,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:20,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040132948] [2020-10-09 11:07:20,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44423540] [2020-10-09 11:07:20,952 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 [2020-10-09 11:07:20,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-09 11:07:20,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:21,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:21,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:21,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:21,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-09 11:07:21,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91328363] [2020-10-09 11:07:21,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:07:21,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:21,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:07:21,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:07:21,023 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-09 11:07:21,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:21,953 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-09 11:07:21,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-09 11:07:21,953 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-09 11:07:21,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:21,954 INFO L225 Difference]: With dead ends: 119 [2020-10-09 11:07:21,954 INFO L226 Difference]: Without dead ends: 113 [2020-10-09 11:07:21,954 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-09 11:07:21,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-09 11:07:21,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-09 11:07:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-09 11:07:21,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-09 11:07:21,957 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-09 11:07:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:21,957 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-09 11:07:21,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:07:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-09 11:07:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:21,958 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:21,958 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:22,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:22,165 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:22,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:22,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-09 11:07:22,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:22,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192096412] [2020-10-09 11:07:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:22,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192096412] [2020-10-09 11:07:22,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234829790] [2020-10-09 11:07:22,392 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 [2020-10-09 11:07:22,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-09 11:07:22,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:22,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:22,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:22,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:22,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:22,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-09 11:07:22,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551868734] [2020-10-09 11:07:22,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:22,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:22,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:22,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:22,492 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-09 11:07:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:23,658 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-09 11:07:23,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-09 11:07:23,659 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-09 11:07:23,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:23,659 INFO L225 Difference]: With dead ends: 116 [2020-10-09 11:07:23,659 INFO L226 Difference]: Without dead ends: 110 [2020-10-09 11:07:23,660 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-09 11:07:23,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-09 11:07:23,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-09 11:07:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-09 11:07:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-09 11:07:23,662 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-09 11:07:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:23,662 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-09 11:07:23,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-09 11:07:23,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:23,662 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:23,663 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:23,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:23,863 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:23,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-09 11:07:23,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:23,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676483524] [2020-10-09 11:07:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:24,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676483524] [2020-10-09 11:07:24,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463434562] [2020-10-09 11:07:24,087 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 [2020-10-09 11:07:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:24,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:24,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:24,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:24,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-09 11:07:24,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739214819] [2020-10-09 11:07:24,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 11:07:24,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 11:07:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-09 11:07:24,155 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-09 11:07:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:25,138 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-09 11:07:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-09 11:07:25,139 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-09 11:07:25,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:25,139 INFO L225 Difference]: With dead ends: 136 [2020-10-09 11:07:25,139 INFO L226 Difference]: Without dead ends: 130 [2020-10-09 11:07:25,140 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-09 11:07:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-09 11:07:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-09 11:07:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-09 11:07:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-09 11:07:25,143 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-09 11:07:25,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:25,144 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-09 11:07:25,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 11:07:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-09 11:07:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-09 11:07:25,144 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:25,144 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:25,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:25,353 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:25,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-09 11:07:25,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:25,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835556947] [2020-10-09 11:07:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:25,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835556947] [2020-10-09 11:07:25,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108676226] [2020-10-09 11:07:25,574 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 [2020-10-09 11:07:25,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:07:25,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:25,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-09 11:07:25,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:25,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:25,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:25,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-09 11:07:25,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553456992] [2020-10-09 11:07:25,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:25,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:25,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:25,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:25,669 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-09 11:07:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:26,885 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-09 11:07:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-09 11:07:26,886 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-09 11:07:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:26,886 INFO L225 Difference]: With dead ends: 117 [2020-10-09 11:07:26,886 INFO L226 Difference]: Without dead ends: 109 [2020-10-09 11:07:26,887 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-09 11:07:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-09 11:07:26,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-09 11:07:26,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-09 11:07:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-09 11:07:26,888 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-09 11:07:26,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:26,889 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-09 11:07:26,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:26,889 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-09 11:07:26,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:26,889 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:26,889 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:27,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:27,090 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:27,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:27,091 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-09 11:07:27,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:27,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288915661] [2020-10-09 11:07:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:27,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288915661] [2020-10-09 11:07:27,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255096424] [2020-10-09 11:07:27,418 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 [2020-10-09 11:07:27,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-09 11:07:27,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:27,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:27,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:27,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:27,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-09 11:07:27,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392186335] [2020-10-09 11:07:27,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:27,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:27,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:27,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:27,485 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-09 11:07:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:28,031 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-09 11:07:28,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 11:07:28,032 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-09 11:07:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:28,032 INFO L225 Difference]: With dead ends: 134 [2020-10-09 11:07:28,032 INFO L226 Difference]: Without dead ends: 128 [2020-10-09 11:07:28,033 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 11:07:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-09 11:07:28,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-09 11:07:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-09 11:07:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-09 11:07:28,035 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-09 11:07:28,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:28,035 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-09 11:07:28,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:28,035 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-09 11:07:28,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:28,035 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:28,035 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:28,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-09 11:07:28,236 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:28,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:28,237 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-09 11:07:28,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:28,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201072687] [2020-10-09 11:07:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:28,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201072687] [2020-10-09 11:07:28,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727933939] [2020-10-09 11:07:28,565 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 [2020-10-09 11:07:28,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:07:28,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:28,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:28,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:28,633 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:28,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:28,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-09 11:07:28,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080786141] [2020-10-09 11:07:28,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:07:28,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:28,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:07:28,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:07:28,647 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-09 11:07:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:29,269 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-09 11:07:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 11:07:29,270 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-09 11:07:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:29,271 INFO L225 Difference]: With dead ends: 131 [2020-10-09 11:07:29,271 INFO L226 Difference]: Without dead ends: 125 [2020-10-09 11:07:29,271 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 11:07:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-09 11:07:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-09 11:07:29,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-09 11:07:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-09 11:07:29,274 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-09 11:07:29,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:29,274 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-09 11:07:29,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:07:29,274 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-09 11:07:29,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:29,274 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:29,274 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:29,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-09 11:07:29,475 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:29,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:29,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-09 11:07:29,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:29,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247791309] [2020-10-09 11:07:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:29,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247791309] [2020-10-09 11:07:29,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860999412] [2020-10-09 11:07:29,784 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 [2020-10-09 11:07:29,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-09 11:07:29,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:29,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:29,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:29,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:29,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-09 11:07:29,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323905626] [2020-10-09 11:07:29,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:29,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:29,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:29,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:29,853 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-09 11:07:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:30,488 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-09 11:07:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 11:07:30,489 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-09 11:07:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:30,490 INFO L225 Difference]: With dead ends: 128 [2020-10-09 11:07:30,490 INFO L226 Difference]: Without dead ends: 122 [2020-10-09 11:07:30,490 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-09 11:07:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-09 11:07:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-09 11:07:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-09 11:07:30,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-09 11:07:30,493 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-09 11:07:30,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:30,493 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-09 11:07:30,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:30,493 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-09 11:07:30,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:30,493 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:30,493 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:30,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:30,694 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:30,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:30,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-09 11:07:30,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:30,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783658409] [2020-10-09 11:07:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:31,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783658409] [2020-10-09 11:07:31,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555104002] [2020-10-09 11:07:31,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:07:31,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-09 11:07:31,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:31,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:31,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:31,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:31,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:31,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-09 11:07:31,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454829378] [2020-10-09 11:07:31,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:07:31,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:31,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:07:31,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:07:31,110 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-09 11:07:31,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:31,865 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-09 11:07:31,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 11:07:31,865 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-09 11:07:31,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:31,866 INFO L225 Difference]: With dead ends: 127 [2020-10-09 11:07:31,866 INFO L226 Difference]: Without dead ends: 121 [2020-10-09 11:07:31,866 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-09 11:07:31,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-09 11:07:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-09 11:07:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-09 11:07:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-09 11:07:31,868 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-09 11:07:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:31,868 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-09 11:07:31,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:07:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-09 11:07:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:31,868 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:31,868 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:32,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-09 11:07:32,069 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:32,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-09 11:07:32,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:32,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162200109] [2020-10-09 11:07:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:32,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162200109] [2020-10-09 11:07:32,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002054918] [2020-10-09 11:07:32,364 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 [2020-10-09 11:07:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:32,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:32,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:32,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:32,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-09 11:07:32,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295754656] [2020-10-09 11:07:32,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:32,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:32,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:32,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:32,432 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-09 11:07:33,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:33,138 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-09 11:07:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 11:07:33,139 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-09 11:07:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:33,140 INFO L225 Difference]: With dead ends: 124 [2020-10-09 11:07:33,140 INFO L226 Difference]: Without dead ends: 118 [2020-10-09 11:07:33,140 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-09 11:07:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-09 11:07:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-09 11:07:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-09 11:07:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-09 11:07:33,143 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-09 11:07:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:33,143 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-09 11:07:33,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-09 11:07:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:33,144 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:33,144 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:33,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:33,344 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:33,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:33,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-09 11:07:33,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:33,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020261358] [2020-10-09 11:07:33,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:33,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020261358] [2020-10-09 11:07:33,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277986286] [2020-10-09 11:07:33,644 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 [2020-10-09 11:07:33,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:07:33,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:33,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:33,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:33,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:33,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:33,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-09 11:07:33,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565674298] [2020-10-09 11:07:33,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:07:33,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:33,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:07:33,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:07:33,738 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-09 11:07:34,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:34,588 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-09 11:07:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 11:07:34,588 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-09 11:07:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:34,589 INFO L225 Difference]: With dead ends: 123 [2020-10-09 11:07:34,589 INFO L226 Difference]: Without dead ends: 117 [2020-10-09 11:07:34,590 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-09 11:07:34,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-09 11:07:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-09 11:07:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-09 11:07:34,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-09 11:07:34,592 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-09 11:07:34,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:34,592 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-09 11:07:34,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:07:34,592 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-09 11:07:34,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:34,592 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:34,592 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:34,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:34,793 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:34,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:34,794 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-09 11:07:34,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:34,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212478801] [2020-10-09 11:07:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:35,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212478801] [2020-10-09 11:07:35,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596722612] [2020-10-09 11:07:35,078 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 [2020-10-09 11:07:35,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-09 11:07:35,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:35,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:35,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:35,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:35,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-09 11:07:35,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937635934] [2020-10-09 11:07:35,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:35,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:35,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:35,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:35,148 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-09 11:07:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:35,918 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-09 11:07:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 11:07:35,919 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-09 11:07:35,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:35,919 INFO L225 Difference]: With dead ends: 120 [2020-10-09 11:07:35,919 INFO L226 Difference]: Without dead ends: 114 [2020-10-09 11:07:35,920 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-09 11:07:35,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-09 11:07:35,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-09 11:07:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-09 11:07:35,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-09 11:07:35,921 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-09 11:07:35,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:35,921 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-09 11:07:35,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-09 11:07:35,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:35,922 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:35,922 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:36,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:36,123 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:36,123 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-09 11:07:36,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:36,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185253997] [2020-10-09 11:07:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:36,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185253997] [2020-10-09 11:07:36,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093181050] [2020-10-09 11:07:36,403 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 [2020-10-09 11:07:36,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:07:36,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:36,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:36,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:36,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:36,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:36,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-09 11:07:36,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497519376] [2020-10-09 11:07:36,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:07:36,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:36,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:07:36,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:07:36,499 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-09 11:07:37,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:37,460 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-09 11:07:37,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 11:07:37,461 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-09 11:07:37,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:37,461 INFO L225 Difference]: With dead ends: 119 [2020-10-09 11:07:37,462 INFO L226 Difference]: Without dead ends: 113 [2020-10-09 11:07:37,462 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-09 11:07:37,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-09 11:07:37,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-09 11:07:37,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-09 11:07:37,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-09 11:07:37,465 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-09 11:07:37,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:37,465 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-09 11:07:37,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:07:37,466 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-09 11:07:37,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:37,466 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:37,466 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:37,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:37,673 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:37,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:37,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-09 11:07:37,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:37,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665283512] [2020-10-09 11:07:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:37,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665283512] [2020-10-09 11:07:37,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176865938] [2020-10-09 11:07:37,938 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 [2020-10-09 11:07:37,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-09 11:07:37,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:37,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:37,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:38,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:38,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-09 11:07:38,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61907155] [2020-10-09 11:07:38,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:38,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:38,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:38,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:38,007 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-09 11:07:38,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:38,849 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-09 11:07:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:07:38,850 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-09 11:07:38,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:38,851 INFO L225 Difference]: With dead ends: 116 [2020-10-09 11:07:38,851 INFO L226 Difference]: Without dead ends: 110 [2020-10-09 11:07:38,851 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-09 11:07:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-09 11:07:38,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-09 11:07:38,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-09 11:07:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-09 11:07:38,854 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-09 11:07:38,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:38,854 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-09 11:07:38,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:38,854 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-09 11:07:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:38,854 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:38,854 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:39,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-09 11:07:39,055 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:39,056 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-09 11:07:39,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:39,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793693357] [2020-10-09 11:07:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:39,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793693357] [2020-10-09 11:07:39,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837237006] [2020-10-09 11:07:39,337 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 [2020-10-09 11:07:39,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-09 11:07:39,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:39,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:39,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:39,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:39,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:39,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-09 11:07:39,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77796383] [2020-10-09 11:07:39,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:07:39,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:39,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:07:39,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:07:39,434 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-09 11:07:40,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:40,478 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-09 11:07:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 11:07:40,479 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-09 11:07:40,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:40,480 INFO L225 Difference]: With dead ends: 115 [2020-10-09 11:07:40,481 INFO L226 Difference]: Without dead ends: 109 [2020-10-09 11:07:40,481 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-09 11:07:40,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-09 11:07:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-09 11:07:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-09 11:07:40,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-09 11:07:40,484 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-09 11:07:40,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:40,484 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-09 11:07:40,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:07:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-09 11:07:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:40,485 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:40,485 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:40,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:40,693 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:40,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-09 11:07:40,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:40,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223658635] [2020-10-09 11:07:40,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:40,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223658635] [2020-10-09 11:07:40,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126119387] [2020-10-09 11:07:40,962 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 [2020-10-09 11:07:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:41,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:41,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:41,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:41,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-09 11:07:41,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524509344] [2020-10-09 11:07:41,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:41,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:41,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:41,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:41,028 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-09 11:07:41,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:41,945 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-09 11:07:41,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-09 11:07:41,946 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-09 11:07:41,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:41,946 INFO L225 Difference]: With dead ends: 112 [2020-10-09 11:07:41,947 INFO L226 Difference]: Without dead ends: 106 [2020-10-09 11:07:41,947 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-09 11:07:41,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-09 11:07:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-09 11:07:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-09 11:07:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-09 11:07:41,949 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-09 11:07:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:41,949 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-09 11:07:41,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:41,950 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-09 11:07:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:41,950 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:41,950 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:42,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-09 11:07:42,151 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:42,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:42,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-09 11:07:42,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:42,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651605853] [2020-10-09 11:07:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:42,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651605853] [2020-10-09 11:07:42,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461095160] [2020-10-09 11:07:42,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:07:42,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:07:42,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:42,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:42,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:42,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:42,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-09 11:07:42,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206629336] [2020-10-09 11:07:42,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:07:42,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:42,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:07:42,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:07:42,520 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-09 11:07:43,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:43,685 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-09 11:07:43,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 11:07:43,686 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-09 11:07:43,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:43,686 INFO L225 Difference]: With dead ends: 111 [2020-10-09 11:07:43,687 INFO L226 Difference]: Without dead ends: 105 [2020-10-09 11:07:43,687 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-09 11:07:43,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-09 11:07:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-09 11:07:43,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-09 11:07:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-09 11:07:43,689 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-09 11:07:43,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:43,690 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-09 11:07:43,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:07:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-09 11:07:43,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:43,690 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:43,690 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:43,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-09 11:07:43,894 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:43,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:43,894 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-09 11:07:43,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:43,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592954708] [2020-10-09 11:07:43,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:44,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592954708] [2020-10-09 11:07:44,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477631794] [2020-10-09 11:07:44,156 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 [2020-10-09 11:07:44,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-09 11:07:44,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:44,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:44,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:44,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:44,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-09 11:07:44,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183237176] [2020-10-09 11:07:44,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:44,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:44,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:44,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:44,233 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-09 11:07:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:45,227 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-09 11:07:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 11:07:45,228 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-09 11:07:45,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:45,228 INFO L225 Difference]: With dead ends: 108 [2020-10-09 11:07:45,228 INFO L226 Difference]: Without dead ends: 102 [2020-10-09 11:07:45,229 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-09 11:07:45,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-09 11:07:45,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-09 11:07:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-09 11:07:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-09 11:07:45,230 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-09 11:07:45,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:45,231 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-09 11:07:45,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:45,231 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-09 11:07:45,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:45,231 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:45,231 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:45,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:45,439 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:45,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:45,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-09 11:07:45,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:45,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480504828] [2020-10-09 11:07:45,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:45,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480504828] [2020-10-09 11:07:45,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141664247] [2020-10-09 11:07:45,706 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 [2020-10-09 11:07:45,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:07:45,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:45,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:45,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:45,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:45,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:45,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-09 11:07:45,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333299329] [2020-10-09 11:07:45,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:07:45,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:45,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:07:45,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:07:45,799 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-09 11:07:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:47,080 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-09 11:07:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-09 11:07:47,081 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-09 11:07:47,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:47,081 INFO L225 Difference]: With dead ends: 107 [2020-10-09 11:07:47,082 INFO L226 Difference]: Without dead ends: 101 [2020-10-09 11:07:47,082 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-09 11:07:47,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-09 11:07:47,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-09 11:07:47,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-09 11:07:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-09 11:07:47,085 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-09 11:07:47,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:47,085 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-09 11:07:47,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:07:47,085 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-09 11:07:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:47,086 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:47,086 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:47,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:47,291 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:47,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:47,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-09 11:07:47,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:47,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49928565] [2020-10-09 11:07:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:47,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49928565] [2020-10-09 11:07:47,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350939218] [2020-10-09 11:07:47,556 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 [2020-10-09 11:07:47,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-09 11:07:47,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:47,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:47,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:47,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:47,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-09 11:07:47,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851948931] [2020-10-09 11:07:47,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:47,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:47,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:47,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:47,631 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-09 11:07:48,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:48,695 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-09 11:07:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-09 11:07:48,696 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-09 11:07:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:48,696 INFO L225 Difference]: With dead ends: 104 [2020-10-09 11:07:48,697 INFO L226 Difference]: Without dead ends: 98 [2020-10-09 11:07:48,697 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-09 11:07:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-09 11:07:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-09 11:07:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-09 11:07:48,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-09 11:07:48,699 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-09 11:07:48,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:48,699 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-09 11:07:48,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-09 11:07:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:48,699 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:48,699 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:48,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:48,900 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:48,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-09 11:07:48,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:48,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139783117] [2020-10-09 11:07:48,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:49,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139783117] [2020-10-09 11:07:49,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869003640] [2020-10-09 11:07:49,162 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 [2020-10-09 11:07:49,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-09 11:07:49,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:49,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:49,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:49,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:49,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:49,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-09 11:07:49,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650215228] [2020-10-09 11:07:49,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:07:49,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:49,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:07:49,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:07:49,270 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-09 11:07:50,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:50,669 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-09 11:07:50,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-09 11:07:50,669 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-09 11:07:50,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:50,670 INFO L225 Difference]: With dead ends: 103 [2020-10-09 11:07:50,670 INFO L226 Difference]: Without dead ends: 97 [2020-10-09 11:07:50,670 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-09 11:07:50,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-09 11:07:50,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-09 11:07:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-09 11:07:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-09 11:07:50,673 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-09 11:07:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:50,673 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-09 11:07:50,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:07:50,674 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-09 11:07:50,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:50,674 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:50,674 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:50,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-09 11:07:50,881 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:50,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-09 11:07:50,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:50,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883254304] [2020-10-09 11:07:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:51,142 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:51,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883254304] [2020-10-09 11:07:51,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310766631] [2020-10-09 11:07:51,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:07:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:51,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:51,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:51,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:51,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-09 11:07:51,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235574960] [2020-10-09 11:07:51,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-09 11:07:51,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:51,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-09 11:07:51,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-09 11:07:51,217 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-09 11:07:52,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:52,355 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-09 11:07:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-09 11:07:52,356 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-09 11:07:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:52,357 INFO L225 Difference]: With dead ends: 119 [2020-10-09 11:07:52,357 INFO L226 Difference]: Without dead ends: 113 [2020-10-09 11:07:52,357 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-09 11:07:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-09 11:07:52,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-09 11:07:52,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-09 11:07:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-09 11:07:52,359 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-09 11:07:52,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:52,359 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-09 11:07:52,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-09 11:07:52,360 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-09 11:07:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:52,360 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:52,360 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:52,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:52,561 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:52,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:52,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-09 11:07:52,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:52,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690308415] [2020-10-09 11:07:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:52,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690308415] [2020-10-09 11:07:52,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212101216] [2020-10-09 11:07:52,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:07:52,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:07:52,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:52,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:52,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:52,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:07:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:52,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:52,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-09 11:07:52,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301008033] [2020-10-09 11:07:52,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:07:52,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:52,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:07:52,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:07:52,923 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-09 11:07:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:54,361 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-09 11:07:54,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-09 11:07:54,362 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-09 11:07:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:54,362 INFO L225 Difference]: With dead ends: 100 [2020-10-09 11:07:54,363 INFO L226 Difference]: Without dead ends: 92 [2020-10-09 11:07:54,363 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-09 11:07:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-09 11:07:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-09 11:07:54,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-09 11:07:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-09 11:07:54,365 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-09 11:07:54,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:54,365 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-09 11:07:54,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:07:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-09 11:07:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-09 11:07:54,366 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:54,366 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:54,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:54,567 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:54,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-09 11:07:54,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:54,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207609146] [2020-10-09 11:07:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:54,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207609146] [2020-10-09 11:07:54,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524463066] [2020-10-09 11:07:54,825 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 [2020-10-09 11:07:54,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-09 11:07:54,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:54,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 11:07:54,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:54,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:07:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:54,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:54,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-09 11:07:54,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962753861] [2020-10-09 11:07:54,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:07:54,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:54,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:07:54,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:07:54,936 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-09 11:07:56,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:56,284 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-09 11:07:56,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-09 11:07:56,285 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-09 11:07:56,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:56,285 INFO L225 Difference]: With dead ends: 116 [2020-10-09 11:07:56,285 INFO L226 Difference]: Without dead ends: 111 [2020-10-09 11:07:56,286 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-09 11:07:56,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-09 11:07:56,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-09 11:07:56,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-09 11:07:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-09 11:07:56,288 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-09 11:07:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:56,288 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-09 11:07:56,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:07:56,288 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-09 11:07:56,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:07:56,289 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:56,289 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:56,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:56,489 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:56,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:56,490 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-09 11:07:56,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:56,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394361282] [2020-10-09 11:07:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:56,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394361282] [2020-10-09 11:07:56,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580261529] [2020-10-09 11:07:56,784 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 [2020-10-09 11:07:56,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:07:56,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:56,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:07:56,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:56,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:07:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:56,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:56,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-09 11:07:56,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476203811] [2020-10-09 11:07:56,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:07:56,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:56,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:07:56,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:07:56,888 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-09 11:07:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:58,330 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-09 11:07:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-09 11:07:58,331 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-09 11:07:58,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:58,332 INFO L225 Difference]: With dead ends: 96 [2020-10-09 11:07:58,332 INFO L226 Difference]: Without dead ends: 91 [2020-10-09 11:07:58,332 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-09 11:07:58,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-09 11:07:58,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-09 11:07:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-09 11:07:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-09 11:07:58,334 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-09 11:07:58,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:58,335 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-09 11:07:58,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:07:58,335 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-09 11:07:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:07:58,336 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:58,336 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:58,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:07:58,544 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:58,545 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-09 11:07:58,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:58,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560267916] [2020-10-09 11:07:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:07:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:58,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560267916] [2020-10-09 11:07:58,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796445214] [2020-10-09 11:07:58,920 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 [2020-10-09 11:07:58,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-09 11:07:58,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:07:58,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:07:58,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:07:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:07:58,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:07:58,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-09 11:07:58,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468462614] [2020-10-09 11:07:58,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:07:58,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:07:58,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:07:58,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:07:58,981 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-09 11:07:59,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:07:59,603 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-09 11:07:59,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 11:07:59,604 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-09 11:07:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:07:59,604 INFO L225 Difference]: With dead ends: 102 [2020-10-09 11:07:59,605 INFO L226 Difference]: Without dead ends: 96 [2020-10-09 11:07:59,605 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-09 11:07:59,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-09 11:07:59,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-09 11:07:59,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-09 11:07:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-09 11:07:59,607 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-09 11:07:59,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:07:59,607 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-09 11:07:59,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:07:59,607 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-09 11:07:59,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:07:59,608 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:07:59,608 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:07:59,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-09 11:07:59,808 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:07:59,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:07:59,809 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-09 11:07:59,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:07:59,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397981044] [2020-10-09 11:07:59,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:07:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:00,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397981044] [2020-10-09 11:08:00,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376163110] [2020-10-09 11:08:00,197 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 [2020-10-09 11:08:00,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-09 11:08:00,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:00,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:00,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:00,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:00,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:00,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-09 11:08:00,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760929331] [2020-10-09 11:08:00,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:00,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:00,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:00,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:00,287 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-09 11:08:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:00,957 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-09 11:08:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 11:08:00,958 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-09 11:08:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:00,959 INFO L225 Difference]: With dead ends: 122 [2020-10-09 11:08:00,959 INFO L226 Difference]: Without dead ends: 116 [2020-10-09 11:08:00,959 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 11:08:00,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-09 11:08:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-09 11:08:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-09 11:08:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-09 11:08:00,962 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-09 11:08:00,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:00,962 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-09 11:08:00,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:00,962 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-09 11:08:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:00,962 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:00,962 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:01,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-09 11:08:01,163 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:01,164 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-09 11:08:01,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:01,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522002165] [2020-10-09 11:08:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:01,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522002165] [2020-10-09 11:08:01,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259807971] [2020-10-09 11:08:01,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:08:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:01,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:01,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:01,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:01,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-09 11:08:01,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429309404] [2020-10-09 11:08:01,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:08:01,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:01,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:08:01,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:08:01,594 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-09 11:08:02,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:02,326 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-09 11:08:02,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 11:08:02,327 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-09 11:08:02,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:02,328 INFO L225 Difference]: With dead ends: 123 [2020-10-09 11:08:02,328 INFO L226 Difference]: Without dead ends: 117 [2020-10-09 11:08:02,328 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-09 11:08:02,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-09 11:08:02,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-09 11:08:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-09 11:08:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-09 11:08:02,330 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-09 11:08:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:02,330 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-09 11:08:02,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:08:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-09 11:08:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:02,331 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:02,331 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:02,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-09 11:08:02,531 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:02,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:02,532 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-09 11:08:02,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:02,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880242129] [2020-10-09 11:08:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:02,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880242129] [2020-10-09 11:08:02,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121851317] [2020-10-09 11:08:02,927 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 [2020-10-09 11:08:02,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:08:02,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:02,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:02,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:03,001 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:03,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:03,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-09 11:08:03,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940653835] [2020-10-09 11:08:03,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:03,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:03,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:03,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:03,015 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-09 11:08:03,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:03,786 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-09 11:08:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 11:08:03,787 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-09 11:08:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:03,788 INFO L225 Difference]: With dead ends: 139 [2020-10-09 11:08:03,788 INFO L226 Difference]: Without dead ends: 133 [2020-10-09 11:08:03,788 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-09 11:08:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-09 11:08:03,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-09 11:08:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-09 11:08:03,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-09 11:08:03,791 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-09 11:08:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:03,791 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-09 11:08:03,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-09 11:08:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:03,792 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:03,792 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:03,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-09 11:08:03,999 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:03,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:03,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-09 11:08:03,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:04,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504369335] [2020-10-09 11:08:04,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:04,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504369335] [2020-10-09 11:08:04,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068701920] [2020-10-09 11:08:04,362 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 [2020-10-09 11:08:04,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-09 11:08:04,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:04,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:04,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:04,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:04,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-09 11:08:04,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639825622] [2020-10-09 11:08:04,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:08:04,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:04,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:08:04,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:08:04,437 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-09 11:08:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:05,211 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-09 11:08:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 11:08:05,212 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-09 11:08:05,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:05,212 INFO L225 Difference]: With dead ends: 139 [2020-10-09 11:08:05,213 INFO L226 Difference]: Without dead ends: 133 [2020-10-09 11:08:05,213 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-09 11:08:05,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-09 11:08:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-09 11:08:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-09 11:08:05,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-09 11:08:05,214 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-09 11:08:05,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:05,215 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-09 11:08:05,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:08:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-09 11:08:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:05,215 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:05,215 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:05,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:05,416 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:05,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-09 11:08:05,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:05,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517360890] [2020-10-09 11:08:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:05,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517360890] [2020-10-09 11:08:05,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635849595] [2020-10-09 11:08:05,784 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 [2020-10-09 11:08:05,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:08:05,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:05,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:05,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:05,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:05,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:05,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-09 11:08:05,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984084548] [2020-10-09 11:08:05,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:05,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:05,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:05,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:05,878 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-09 11:08:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:06,788 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-09 11:08:06,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 11:08:06,789 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-09 11:08:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:06,789 INFO L225 Difference]: With dead ends: 136 [2020-10-09 11:08:06,789 INFO L226 Difference]: Without dead ends: 130 [2020-10-09 11:08:06,789 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-09 11:08:06,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-09 11:08:06,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-09 11:08:06,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-09 11:08:06,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-09 11:08:06,791 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-09 11:08:06,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:06,791 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-09 11:08:06,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:06,791 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-09 11:08:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:06,791 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:06,791 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:06,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-09 11:08:06,992 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:06,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:06,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-09 11:08:06,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:06,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58041933] [2020-10-09 11:08:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:07,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58041933] [2020-10-09 11:08:07,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666428168] [2020-10-09 11:08:07,339 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 [2020-10-09 11:08:07,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-09 11:08:07,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:07,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:07,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:07,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:07,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-09 11:08:07,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617689356] [2020-10-09 11:08:07,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:08:07,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:07,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:08:07,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:08:07,408 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-09 11:08:08,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:08,295 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-09 11:08:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:08:08,296 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-09 11:08:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:08,296 INFO L225 Difference]: With dead ends: 137 [2020-10-09 11:08:08,297 INFO L226 Difference]: Without dead ends: 131 [2020-10-09 11:08:08,297 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-09 11:08:08,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-09 11:08:08,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-09 11:08:08,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-09 11:08:08,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-09 11:08:08,299 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-09 11:08:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:08,300 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-09 11:08:08,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:08:08,300 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-09 11:08:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:08,300 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:08,300 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:08,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:08,501 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:08,501 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-09 11:08:08,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:08,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116894572] [2020-10-09 11:08:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:08,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116894572] [2020-10-09 11:08:08,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287102920] [2020-10-09 11:08:08,828 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 [2020-10-09 11:08:08,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-09 11:08:08,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:08,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:08,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:08,909 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:08,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:08,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-09 11:08:08,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516302633] [2020-10-09 11:08:08,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:08,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:08,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:08,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:08,926 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-09 11:08:09,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:09,980 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-09 11:08:09,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 11:08:09,981 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-09 11:08:09,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:09,982 INFO L225 Difference]: With dead ends: 134 [2020-10-09 11:08:09,982 INFO L226 Difference]: Without dead ends: 128 [2020-10-09 11:08:09,982 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-09 11:08:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-09 11:08:09,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-09 11:08:09,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-09 11:08:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-09 11:08:09,984 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-09 11:08:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:09,984 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-09 11:08:09,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:09,985 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-09 11:08:09,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:09,985 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:09,985 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:10,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-09 11:08:10,188 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:10,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:10,188 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-09 11:08:10,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:10,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340923971] [2020-10-09 11:08:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:10,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340923971] [2020-10-09 11:08:10,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351707981] [2020-10-09 11:08:10,509 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 [2020-10-09 11:08:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:10,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:10,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:10,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:10,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-09 11:08:10,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128324214] [2020-10-09 11:08:10,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:08:10,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:10,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:08:10,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:08:10,577 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-09 11:08:11,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:11,553 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-09 11:08:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-09 11:08:11,554 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-09 11:08:11,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:11,554 INFO L225 Difference]: With dead ends: 135 [2020-10-09 11:08:11,555 INFO L226 Difference]: Without dead ends: 129 [2020-10-09 11:08:11,555 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-09 11:08:11,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-09 11:08:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-09 11:08:11,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-09 11:08:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-09 11:08:11,557 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-09 11:08:11,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:11,558 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-09 11:08:11,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:08:11,558 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-09 11:08:11,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:11,558 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:11,558 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:11,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:11,759 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:11,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:11,759 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-09 11:08:11,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:11,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345959173] [2020-10-09 11:08:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:12,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345959173] [2020-10-09 11:08:12,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372100044] [2020-10-09 11:08:12,093 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 [2020-10-09 11:08:12,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:08:12,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:12,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:12,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:12,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:12,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:12,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-09 11:08:12,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729038822] [2020-10-09 11:08:12,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:12,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:12,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:12,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:12,191 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-09 11:08:13,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:13,305 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-09 11:08:13,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 11:08:13,307 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-09 11:08:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:13,307 INFO L225 Difference]: With dead ends: 132 [2020-10-09 11:08:13,307 INFO L226 Difference]: Without dead ends: 126 [2020-10-09 11:08:13,308 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-09 11:08:13,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-09 11:08:13,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-09 11:08:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-09 11:08:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-09 11:08:13,310 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-09 11:08:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:13,310 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-09 11:08:13,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-09 11:08:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:13,310 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:13,310 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:13,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:13,511 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:13,512 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-09 11:08:13,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:13,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68984823] [2020-10-09 11:08:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:13,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68984823] [2020-10-09 11:08:13,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31354974] [2020-10-09 11:08:13,831 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 [2020-10-09 11:08:13,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-09 11:08:13,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:13,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:13,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:13,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:13,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-09 11:08:13,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227482698] [2020-10-09 11:08:13,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:08:13,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:13,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:08:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:08:13,905 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-09 11:08:14,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:14,920 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-09 11:08:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 11:08:14,922 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-09 11:08:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:14,922 INFO L225 Difference]: With dead ends: 133 [2020-10-09 11:08:14,922 INFO L226 Difference]: Without dead ends: 127 [2020-10-09 11:08:14,923 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-09 11:08:14,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-09 11:08:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-09 11:08:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-09 11:08:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-09 11:08:14,925 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-09 11:08:14,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:14,925 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-09 11:08:14,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:08:14,925 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-09 11:08:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:14,926 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:14,926 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:15,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:15,126 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:15,127 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-09 11:08:15,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:15,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656097756] [2020-10-09 11:08:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:15,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656097756] [2020-10-09 11:08:15,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670507317] [2020-10-09 11:08:15,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:08:15,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:08:15,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:15,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:15,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:15,535 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:15,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:15,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-09 11:08:15,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621127018] [2020-10-09 11:08:15,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:15,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:15,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:15,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:15,555 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-09 11:08:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:16,770 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-09 11:08:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 11:08:16,771 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-09 11:08:16,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:16,772 INFO L225 Difference]: With dead ends: 130 [2020-10-09 11:08:16,772 INFO L226 Difference]: Without dead ends: 124 [2020-10-09 11:08:16,772 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-09 11:08:16,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-09 11:08:16,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-09 11:08:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-09 11:08:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-09 11:08:16,775 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-09 11:08:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:16,775 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-09 11:08:16,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-09 11:08:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:16,776 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:16,776 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:16,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:16,977 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:16,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:16,977 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-09 11:08:16,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:16,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969587094] [2020-10-09 11:08:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:17,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969587094] [2020-10-09 11:08:17,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994647323] [2020-10-09 11:08:17,291 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 [2020-10-09 11:08:17,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-09 11:08:17,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:17,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:17,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:17,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:17,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-09 11:08:17,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901671611] [2020-10-09 11:08:17,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:08:17,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:17,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:08:17,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:08:17,369 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-09 11:08:18,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:18,458 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-09 11:08:18,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-09 11:08:18,459 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-09 11:08:18,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:18,459 INFO L225 Difference]: With dead ends: 131 [2020-10-09 11:08:18,460 INFO L226 Difference]: Without dead ends: 125 [2020-10-09 11:08:18,460 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-09 11:08:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-09 11:08:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-09 11:08:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-09 11:08:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-09 11:08:18,462 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-09 11:08:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:18,463 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-09 11:08:18,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:08:18,463 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-09 11:08:18,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:18,463 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:18,463 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:18,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-09 11:08:18,664 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:18,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:18,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-09 11:08:18,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:18,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566551643] [2020-10-09 11:08:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:18,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566551643] [2020-10-09 11:08:18,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228489823] [2020-10-09 11:08:18,992 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 [2020-10-09 11:08:19,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-09 11:08:19,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:19,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:19,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:19,077 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:19,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:19,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-09 11:08:19,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247908425] [2020-10-09 11:08:19,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:19,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:19,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:19,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:19,097 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-09 11:08:20,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:20,421 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-09 11:08:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-09 11:08:20,422 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-09 11:08:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:20,422 INFO L225 Difference]: With dead ends: 128 [2020-10-09 11:08:20,422 INFO L226 Difference]: Without dead ends: 122 [2020-10-09 11:08:20,422 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-09 11:08:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-09 11:08:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-09 11:08:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-09 11:08:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-09 11:08:20,425 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-09 11:08:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:20,425 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-09 11:08:20,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:20,425 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-09 11:08:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:20,425 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:20,426 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:20,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-09 11:08:20,626 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:20,627 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-09 11:08:20,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:20,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923119209] [2020-10-09 11:08:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:20,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923119209] [2020-10-09 11:08:20,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835344346] [2020-10-09 11:08:20,939 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 [2020-10-09 11:08:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:20,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:20,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:21,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:21,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-09 11:08:21,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430181171] [2020-10-09 11:08:21,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:08:21,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:21,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:08:21,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:08:21,011 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-09 11:08:22,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:22,183 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-09 11:08:22,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-09 11:08:22,184 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-09 11:08:22,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:22,185 INFO L225 Difference]: With dead ends: 129 [2020-10-09 11:08:22,185 INFO L226 Difference]: Without dead ends: 123 [2020-10-09 11:08:22,185 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-09 11:08:22,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-09 11:08:22,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-09 11:08:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-09 11:08:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-09 11:08:22,187 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-09 11:08:22,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:22,187 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-09 11:08:22,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:08:22,187 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-09 11:08:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:22,187 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:22,187 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:22,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-09 11:08:22,388 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:22,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:22,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-09 11:08:22,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:22,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586167817] [2020-10-09 11:08:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:22,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586167817] [2020-10-09 11:08:22,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796266446] [2020-10-09 11:08:22,704 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 [2020-10-09 11:08:22,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:08:22,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:22,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:22,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:22,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:22,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:22,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-09 11:08:22,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487958942] [2020-10-09 11:08:22,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:22,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:22,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:22,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:22,803 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-09 11:08:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:24,261 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-09 11:08:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-09 11:08:24,262 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-09 11:08:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:24,262 INFO L225 Difference]: With dead ends: 126 [2020-10-09 11:08:24,262 INFO L226 Difference]: Without dead ends: 120 [2020-10-09 11:08:24,263 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-09 11:08:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-09 11:08:24,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-09 11:08:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-09 11:08:24,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-09 11:08:24,265 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-09 11:08:24,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:24,265 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-09 11:08:24,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:24,265 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-09 11:08:24,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:24,266 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:24,266 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:24,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-09 11:08:24,467 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:24,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:24,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-09 11:08:24,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:24,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881442242] [2020-10-09 11:08:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:24,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881442242] [2020-10-09 11:08:24,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488236572] [2020-10-09 11:08:24,771 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 [2020-10-09 11:08:24,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-09 11:08:24,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:24,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:24,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:24,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:24,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-09 11:08:24,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530868813] [2020-10-09 11:08:24,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:08:24,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:24,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:08:24,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:08:24,854 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-09 11:08:26,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:26,122 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-09 11:08:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-09 11:08:26,123 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-09 11:08:26,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:26,124 INFO L225 Difference]: With dead ends: 127 [2020-10-09 11:08:26,124 INFO L226 Difference]: Without dead ends: 121 [2020-10-09 11:08:26,124 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-09 11:08:26,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-09 11:08:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-09 11:08:26,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-09 11:08:26,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-09 11:08:26,126 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-09 11:08:26,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:26,126 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-09 11:08:26,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:08:26,126 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-09 11:08:26,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:26,127 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:26,127 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:26,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:26,328 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:26,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:26,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-09 11:08:26,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:26,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209490224] [2020-10-09 11:08:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:26,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209490224] [2020-10-09 11:08:26,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692689425] [2020-10-09 11:08:26,641 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 [2020-10-09 11:08:26,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:08:26,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:26,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:26,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:26,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:26,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:26,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-09 11:08:26,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578962918] [2020-10-09 11:08:26,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:26,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:26,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:26,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:26,746 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-09 11:08:28,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:28,328 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-09 11:08:28,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-09 11:08:28,329 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-09 11:08:28,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:28,329 INFO L225 Difference]: With dead ends: 124 [2020-10-09 11:08:28,329 INFO L226 Difference]: Without dead ends: 118 [2020-10-09 11:08:28,330 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-09 11:08:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-09 11:08:28,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-09 11:08:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-09 11:08:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-09 11:08:28,332 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-09 11:08:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:28,332 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-09 11:08:28,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-09 11:08:28,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:28,333 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:28,333 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:28,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-09 11:08:28,533 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:28,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:28,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-09 11:08:28,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:28,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902951104] [2020-10-09 11:08:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:28,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902951104] [2020-10-09 11:08:28,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125024863] [2020-10-09 11:08:28,819 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 [2020-10-09 11:08:28,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-09 11:08:28,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:28,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:28,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:28,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:28,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-09 11:08:28,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432978457] [2020-10-09 11:08:28,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-09 11:08:28,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:28,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-09 11:08:28,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-09 11:08:28,902 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-09 11:08:30,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:30,283 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-09 11:08:30,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-09 11:08:30,284 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-09 11:08:30,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:30,285 INFO L225 Difference]: With dead ends: 144 [2020-10-09 11:08:30,285 INFO L226 Difference]: Without dead ends: 138 [2020-10-09 11:08:30,286 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-09 11:08:30,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-09 11:08:30,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-09 11:08:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-09 11:08:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-09 11:08:30,289 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-09 11:08:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:30,289 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-09 11:08:30,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-09 11:08:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-09 11:08:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 11:08:30,289 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:30,290 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:30,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:30,498 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:30,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-09 11:08:30,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:30,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429799632] [2020-10-09 11:08:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:30,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429799632] [2020-10-09 11:08:30,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718595260] [2020-10-09 11:08:30,813 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:08:30,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-09 11:08:30,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:30,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 11:08:30,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:30,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:30,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:30,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-09 11:08:30,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435437632] [2020-10-09 11:08:30,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:30,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:30,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:30,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:30,916 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-09 11:08:32,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:32,549 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-09 11:08:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-09 11:08:32,550 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-09 11:08:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:32,550 INFO L225 Difference]: With dead ends: 125 [2020-10-09 11:08:32,550 INFO L226 Difference]: Without dead ends: 117 [2020-10-09 11:08:32,550 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 11:08:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-09 11:08:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-09 11:08:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-09 11:08:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-09 11:08:32,552 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-09 11:08:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:32,552 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-09 11:08:32,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-09 11:08:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:32,552 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:32,552 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:32,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-09 11:08:32,753 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:32,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:32,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-09 11:08:32,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:32,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726953171] [2020-10-09 11:08:32,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:33,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726953171] [2020-10-09 11:08:33,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286606359] [2020-10-09 11:08:33,213 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 [2020-10-09 11:08:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:33,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:33,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:33,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:33,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-09 11:08:33,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891930400] [2020-10-09 11:08:33,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:33,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:33,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:33,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:33,277 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-09 11:08:34,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:34,027 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-09 11:08:34,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 11:08:34,028 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-09 11:08:34,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:34,028 INFO L225 Difference]: With dead ends: 144 [2020-10-09 11:08:34,029 INFO L226 Difference]: Without dead ends: 138 [2020-10-09 11:08:34,029 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-10-09 11:08:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-09 11:08:34,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-09 11:08:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-09 11:08:34,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-09 11:08:34,032 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-09 11:08:34,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:34,032 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-09 11:08:34,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:34,032 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-09 11:08:34,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:34,032 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:34,032 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:34,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:34,233 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:34,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-09 11:08:34,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:34,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584836264] [2020-10-09 11:08:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:34,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584836264] [2020-10-09 11:08:34,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598306532] [2020-10-09 11:08:34,700 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 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 [2020-10-09 11:08:34,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:08:34,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:34,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:34,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:34,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:34,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:34,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-09 11:08:34,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473237199] [2020-10-09 11:08:34,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:08:34,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:34,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:08:34,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:08:34,797 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-09 11:08:35,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:35,660 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-09 11:08:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 11:08:35,661 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-09 11:08:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:35,662 INFO L225 Difference]: With dead ends: 141 [2020-10-09 11:08:35,662 INFO L226 Difference]: Without dead ends: 135 [2020-10-09 11:08:35,662 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-10-09 11:08:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-09 11:08:35,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-09 11:08:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 11:08:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-09 11:08:35,664 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-09 11:08:35,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:35,665 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-09 11:08:35,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:08:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-09 11:08:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:35,665 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:35,665 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:35,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-09 11:08:35,866 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:35,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:35,866 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-09 11:08:35,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:35,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875275621] [2020-10-09 11:08:35,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:36,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875275621] [2020-10-09 11:08:36,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984538770] [2020-10-09 11:08:36,296 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 [2020-10-09 11:08:36,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-09 11:08:36,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:36,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:36,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:36,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:36,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-09 11:08:36,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653614818] [2020-10-09 11:08:36,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:36,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:36,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:36,377 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-09 11:08:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:37,244 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-09 11:08:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 11:08:37,246 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-09 11:08:37,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:37,246 INFO L225 Difference]: With dead ends: 138 [2020-10-09 11:08:37,246 INFO L226 Difference]: Without dead ends: 132 [2020-10-09 11:08:37,247 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-10-09 11:08:37,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-09 11:08:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-09 11:08:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-09 11:08:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-09 11:08:37,250 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-09 11:08:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:37,250 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-09 11:08:37,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-09 11:08:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:37,251 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:37,251 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:37,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:37,459 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:37,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:37,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-09 11:08:37,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:37,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490814195] [2020-10-09 11:08:37,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:37,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490814195] [2020-10-09 11:08:37,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624342047] [2020-10-09 11:08:37,896 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 [2020-10-09 11:08:37,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:08:37,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:37,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:37,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:37,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:37,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:37,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-09 11:08:37,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019312879] [2020-10-09 11:08:37,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:08:37,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:37,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:08:37,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:08:37,993 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-09 11:08:39,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:39,016 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-09 11:08:39,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 11:08:39,017 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-09 11:08:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:39,018 INFO L225 Difference]: With dead ends: 137 [2020-10-09 11:08:39,018 INFO L226 Difference]: Without dead ends: 131 [2020-10-09 11:08:39,018 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-10-09 11:08:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-09 11:08:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-09 11:08:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 11:08:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-09 11:08:39,021 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-09 11:08:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:39,021 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-09 11:08:39,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:08:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-09 11:08:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:39,021 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:39,021 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:39,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-09 11:08:39,222 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:39,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:39,223 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-09 11:08:39,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:39,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552177727] [2020-10-09 11:08:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:39,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552177727] [2020-10-09 11:08:39,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804089647] [2020-10-09 11:08:39,632 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 [2020-10-09 11:08:39,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-09 11:08:39,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:39,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:39,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:39,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:39,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-09 11:08:39,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851244883] [2020-10-09 11:08:39,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:39,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:39,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:39,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:39,706 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-09 11:08:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:40,651 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-09 11:08:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 11:08:40,652 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-09 11:08:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:40,652 INFO L225 Difference]: With dead ends: 134 [2020-10-09 11:08:40,653 INFO L226 Difference]: Without dead ends: 128 [2020-10-09 11:08:40,653 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-10-09 11:08:40,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-09 11:08:40,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-09 11:08:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-09 11:08:40,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-09 11:08:40,655 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-09 11:08:40,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:40,656 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-09 11:08:40,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-09 11:08:40,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:40,656 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:40,656 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:40,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-09 11:08:40,865 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:40,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:40,865 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-09 11:08:40,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:40,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536555473] [2020-10-09 11:08:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:41,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536555473] [2020-10-09 11:08:41,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022252232] [2020-10-09 11:08:41,269 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 [2020-10-09 11:08:41,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-09 11:08:41,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:41,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:41,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:41,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:41,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:41,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-09 11:08:41,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33200562] [2020-10-09 11:08:41,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:08:41,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:41,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:08:41,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:08:41,370 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-09 11:08:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:42,529 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-09 11:08:42,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 11:08:42,530 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-09 11:08:42,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:42,530 INFO L225 Difference]: With dead ends: 133 [2020-10-09 11:08:42,530 INFO L226 Difference]: Without dead ends: 127 [2020-10-09 11:08:42,531 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-10-09 11:08:42,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-09 11:08:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-09 11:08:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 11:08:42,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-09 11:08:42,534 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-09 11:08:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:42,534 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-09 11:08:42,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:08:42,534 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-09 11:08:42,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:42,534 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:42,534 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:42,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-09 11:08:42,739 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:42,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:42,739 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-09 11:08:42,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:42,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560427954] [2020-10-09 11:08:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:43,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560427954] [2020-10-09 11:08:43,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935863229] [2020-10-09 11:08:43,128 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 [2020-10-09 11:08:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:43,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:43,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:43,192 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:43,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:43,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-09 11:08:43,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734553684] [2020-10-09 11:08:43,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:43,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:43,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:43,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:43,194 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-09 11:08:44,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:44,242 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-09 11:08:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:08:44,243 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-09 11:08:44,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:44,243 INFO L225 Difference]: With dead ends: 130 [2020-10-09 11:08:44,244 INFO L226 Difference]: Without dead ends: 124 [2020-10-09 11:08:44,244 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-10-09 11:08:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-09 11:08:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-09 11:08:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-09 11:08:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-09 11:08:44,247 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-09 11:08:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:44,247 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-09 11:08:44,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-09 11:08:44,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:44,248 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:44,248 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:44,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:44,450 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:44,450 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-09 11:08:44,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:44,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422996221] [2020-10-09 11:08:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:44,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422996221] [2020-10-09 11:08:44,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476005990] [2020-10-09 11:08:44,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 11:08:44,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:08:44,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:44,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:44,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:44,957 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:44,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:44,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-09 11:08:44,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941513180] [2020-10-09 11:08:44,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:08:44,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:44,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:08:44,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:08:44,978 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-09 11:08:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:46,243 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-09 11:08:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 11:08:46,245 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-09 11:08:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:46,245 INFO L225 Difference]: With dead ends: 129 [2020-10-09 11:08:46,245 INFO L226 Difference]: Without dead ends: 123 [2020-10-09 11:08:46,246 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-10-09 11:08:46,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-09 11:08:46,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-09 11:08:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 11:08:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-09 11:08:46,249 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-09 11:08:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:46,249 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-09 11:08:46,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:08:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-09 11:08:46,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:46,249 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:46,250 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:46,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-09 11:08:46,450 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:46,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-09 11:08:46,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:46,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703430073] [2020-10-09 11:08:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:46,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703430073] [2020-10-09 11:08:46,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473703901] [2020-10-09 11:08:46,846 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 [2020-10-09 11:08:46,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-09 11:08:46,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:46,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:46,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:46,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:46,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-09 11:08:46,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450488034] [2020-10-09 11:08:46,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:46,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:46,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:46,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:46,926 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-09 11:08:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:48,022 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-09 11:08:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-09 11:08:48,023 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-09 11:08:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:48,023 INFO L225 Difference]: With dead ends: 126 [2020-10-09 11:08:48,023 INFO L226 Difference]: Without dead ends: 120 [2020-10-09 11:08:48,024 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-10-09 11:08:48,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-09 11:08:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-09 11:08:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-09 11:08:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-09 11:08:48,026 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-09 11:08:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:48,026 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-09 11:08:48,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-09 11:08:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:48,027 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:48,027 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:48,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:48,228 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-09 11:08:48,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:48,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891522000] [2020-10-09 11:08:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:48,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891522000] [2020-10-09 11:08:48,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821285978] [2020-10-09 11:08:48,618 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 [2020-10-09 11:08:48,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:08:48,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:48,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:48,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:48,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:48,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:48,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-09 11:08:48,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606519214] [2020-10-09 11:08:48,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:08:48,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:48,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:08:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:08:48,725 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-09 11:08:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:50,096 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-09 11:08:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 11:08:50,098 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-09 11:08:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:50,098 INFO L225 Difference]: With dead ends: 125 [2020-10-09 11:08:50,098 INFO L226 Difference]: Without dead ends: 119 [2020-10-09 11:08:50,099 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-10-09 11:08:50,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-09 11:08:50,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-09 11:08:50,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 11:08:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-09 11:08:50,101 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-09 11:08:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:50,101 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-09 11:08:50,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:08:50,102 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-09 11:08:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:50,102 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:50,102 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:50,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-09 11:08:50,304 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:50,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:50,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-09 11:08:50,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:50,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523334070] [2020-10-09 11:08:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:50,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523334070] [2020-10-09 11:08:50,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735726196] [2020-10-09 11:08:50,691 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 [2020-10-09 11:08:50,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-09 11:08:50,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:50,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:50,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:50,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:50,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-09 11:08:50,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695975135] [2020-10-09 11:08:50,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:50,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:50,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:50,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:50,767 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-09 11:08:51,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:51,995 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-09 11:08:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 11:08:51,996 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-09 11:08:51,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:51,997 INFO L225 Difference]: With dead ends: 122 [2020-10-09 11:08:51,999 INFO L226 Difference]: Without dead ends: 116 [2020-10-09 11:08:51,999 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-10-09 11:08:52,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-09 11:08:52,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-09 11:08:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-09 11:08:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-09 11:08:52,001 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-09 11:08:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:52,002 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-09 11:08:52,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-09 11:08:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:52,002 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:52,002 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:52,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:52,208 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:52,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:52,208 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-09 11:08:52,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:52,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719276468] [2020-10-09 11:08:52,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:52,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719276468] [2020-10-09 11:08:52,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154997615] [2020-10-09 11:08:52,602 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 [2020-10-09 11:08:52,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-09 11:08:52,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:52,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:52,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:52,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:52,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:52,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-09 11:08:52,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377902342] [2020-10-09 11:08:52,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:08:52,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:52,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:08:52,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:08:52,710 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-09 11:08:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:54,248 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-09 11:08:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-09 11:08:54,249 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-09 11:08:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:54,249 INFO L225 Difference]: With dead ends: 121 [2020-10-09 11:08:54,250 INFO L226 Difference]: Without dead ends: 115 [2020-10-09 11:08:54,250 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-10-09 11:08:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-09 11:08:54,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-09 11:08:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 11:08:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-09 11:08:54,252 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-09 11:08:54,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:54,253 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-09 11:08:54,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:08:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-09 11:08:54,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:54,253 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:54,253 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:54,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-09 11:08:54,454 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:54,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:54,455 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-09 11:08:54,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:54,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378930722] [2020-10-09 11:08:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:54,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378930722] [2020-10-09 11:08:54,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900515016] [2020-10-09 11:08:54,833 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 [2020-10-09 11:08:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:54,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:54,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:54,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:54,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-09 11:08:54,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688594994] [2020-10-09 11:08:54,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:54,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:54,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:54,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:54,910 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-09 11:08:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:56,255 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-09 11:08:56,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-09 11:08:56,256 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-09 11:08:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:56,256 INFO L225 Difference]: With dead ends: 118 [2020-10-09 11:08:56,256 INFO L226 Difference]: Without dead ends: 112 [2020-10-09 11:08:56,257 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-09 11:08:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-09 11:08:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-09 11:08:56,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-09 11:08:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-09 11:08:56,259 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-09 11:08:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:56,259 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-09 11:08:56,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:08:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-09 11:08:56,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:56,260 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:56,260 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:56,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:56,461 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:56,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:56,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-09 11:08:56,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:56,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665204621] [2020-10-09 11:08:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:56,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665204621] [2020-10-09 11:08:56,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579210065] [2020-10-09 11:08:56,836 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 [2020-10-09 11:08:56,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:08:56,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:56,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:56,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:56,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:08:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:56,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:56,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-09 11:08:56,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737083689] [2020-10-09 11:08:56,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:08:56,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:56,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:08:56,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:08:56,959 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-09 11:08:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:08:58,704 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-09 11:08:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-09 11:08:58,705 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-09 11:08:58,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:08:58,706 INFO L225 Difference]: With dead ends: 117 [2020-10-09 11:08:58,706 INFO L226 Difference]: Without dead ends: 111 [2020-10-09 11:08:58,707 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-10-09 11:08:58,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-09 11:08:58,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-09 11:08:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 11:08:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-09 11:08:58,708 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-09 11:08:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:08:58,709 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-09 11:08:58,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:08:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-09 11:08:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:08:58,709 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:08:58,709 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:08:58,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:08:58,910 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:08:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:08:58,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-09 11:08:58,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:08:58,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021162931] [2020-10-09 11:08:58,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:08:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:08:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:59,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021162931] [2020-10-09 11:08:59,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75132068] [2020-10-09 11:08:59,252 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 [2020-10-09 11:08:59,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-09 11:08:59,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:08:59,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:08:59,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:08:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:08:59,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:08:59,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-09 11:08:59,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522607095] [2020-10-09 11:08:59,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:08:59,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:08:59,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:08:59,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:08:59,337 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-09 11:09:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:00,806 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-09 11:09:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-09 11:09:00,807 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-09 11:09:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:00,808 INFO L225 Difference]: With dead ends: 114 [2020-10-09 11:09:00,808 INFO L226 Difference]: Without dead ends: 108 [2020-10-09 11:09:00,808 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-09 11:09:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-09 11:09:00,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-09 11:09:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-09 11:09:00,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-09 11:09:00,810 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-09 11:09:00,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:00,810 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-09 11:09:00,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:09:00,810 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-09 11:09:00,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:09:00,811 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:00,811 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:01,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-09 11:09:01,011 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:01,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-09 11:09:01,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:01,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441505143] [2020-10-09 11:09:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:01,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441505143] [2020-10-09 11:09:01,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155832062] [2020-10-09 11:09:01,350 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 [2020-10-09 11:09:01,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:09:01,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:01,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:09:01,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:01,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:09:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:01,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:01,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-09 11:09:01,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063120687] [2020-10-09 11:09:01,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:09:01,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:01,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:09:01,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:09:01,458 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-09 11:09:03,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:03,328 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-09 11:09:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-09 11:09:03,329 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-09 11:09:03,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:03,329 INFO L225 Difference]: With dead ends: 113 [2020-10-09 11:09:03,329 INFO L226 Difference]: Without dead ends: 107 [2020-10-09 11:09:03,329 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-10-09 11:09:03,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-09 11:09:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-10-09 11:09:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 11:09:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-09 11:09:03,332 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-09 11:09:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:03,332 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-09 11:09:03,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:09:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-09 11:09:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:09:03,332 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:03,332 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:03,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-09 11:09:03,533 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:03,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:03,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-10-09 11:09:03,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:03,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270649744] [2020-10-09 11:09:03,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:03,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270649744] [2020-10-09 11:09:03,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694639709] [2020-10-09 11:09:03,872 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 [2020-10-09 11:09:03,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-09 11:09:03,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:03,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:09:03,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:03,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:03,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-09 11:09:03,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839786556] [2020-10-09 11:09:03,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:09:03,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:03,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:09:03,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:09:03,965 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-09 11:09:05,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:05,606 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-10-09 11:09:05,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-09 11:09:05,607 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-09 11:09:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:05,608 INFO L225 Difference]: With dead ends: 110 [2020-10-09 11:09:05,608 INFO L226 Difference]: Without dead ends: 104 [2020-10-09 11:09:05,609 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-10-09 11:09:05,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-09 11:09:05,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-09 11:09:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-09 11:09:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-09 11:09:05,611 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-09 11:09:05,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:05,611 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-09 11:09:05,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:09:05,611 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-09 11:09:05,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:09:05,611 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:05,611 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:05,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-09 11:09:05,812 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:05,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-10-09 11:09:05,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:05,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146924190] [2020-10-09 11:09:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:06,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146924190] [2020-10-09 11:09:06,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589065918] [2020-10-09 11:09:06,193 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 [2020-10-09 11:09:06,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-09 11:09:06,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:06,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:09:06,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:06,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:09:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:06,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:06,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-09 11:09:06,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829605556] [2020-10-09 11:09:06,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:09:06,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:06,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:09:06,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:09:06,302 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-09 11:09:08,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:08,290 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-10-09 11:09:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-09 11:09:08,291 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-09 11:09:08,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:08,291 INFO L225 Difference]: With dead ends: 109 [2020-10-09 11:09:08,292 INFO L226 Difference]: Without dead ends: 103 [2020-10-09 11:09:08,292 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-10-09 11:09:08,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-09 11:09:08,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-09 11:09:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 11:09:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-09 11:09:08,294 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-09 11:09:08,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:08,294 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-09 11:09:08,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:09:08,294 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-09 11:09:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:09:08,295 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:08,295 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:08,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-09 11:09:08,495 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:08,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:08,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-10-09 11:09:08,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:08,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107127819] [2020-10-09 11:09:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:08,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107127819] [2020-10-09 11:09:08,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582113268] [2020-10-09 11:09:08,876 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 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 [2020-10-09 11:09:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:09:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:08,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:08,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-09 11:09:08,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315523811] [2020-10-09 11:09:08,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 11:09:08,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:08,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 11:09:08,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-09 11:09:08,960 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-09 11:09:10,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:10,619 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-09 11:09:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-09 11:09:10,620 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-09 11:09:10,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:10,621 INFO L225 Difference]: With dead ends: 125 [2020-10-09 11:09:10,621 INFO L226 Difference]: Without dead ends: 119 [2020-10-09 11:09:10,621 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 11:09:10,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-09 11:09:10,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-10-09 11:09:10,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-09 11:09:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-10-09 11:09:10,623 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-10-09 11:09:10,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:10,624 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-10-09 11:09:10,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 11:09:10,624 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-10-09 11:09:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:09:10,624 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:10,624 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:10,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-09 11:09:10,825 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-10-09 11:09:10,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:10,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967105535] [2020-10-09 11:09:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:11,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967105535] [2020-10-09 11:09:11,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173264685] [2020-10-09 11:09:11,198 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 [2020-10-09 11:09:11,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:09:11,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:11,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:09:11,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:11,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:09:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:11,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:11,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-09 11:09:11,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660409017] [2020-10-09 11:09:11,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:09:11,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:11,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:09:11,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:09:11,321 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-10-09 11:09:13,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:13,334 INFO L93 Difference]: Finished difference Result 106 states and 265 transitions. [2020-10-09 11:09:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-09 11:09:13,335 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-09 11:09:13,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:13,336 INFO L225 Difference]: With dead ends: 106 [2020-10-09 11:09:13,336 INFO L226 Difference]: Without dead ends: 98 [2020-10-09 11:09:13,336 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-10-09 11:09:13,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-09 11:09:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-09 11:09:13,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-09 11:09:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-10-09 11:09:13,337 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-10-09 11:09:13,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:13,338 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-10-09 11:09:13,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:09:13,338 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-10-09 11:09:13,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-09 11:09:13,338 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:13,338 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:13,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:13,539 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:13,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:13,540 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-10-09 11:09:13,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:13,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168156258] [2020-10-09 11:09:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:13,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168156258] [2020-10-09 11:09:13,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411577004] [2020-10-09 11:09:13,940 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 [2020-10-09 11:09:13,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-09 11:09:13,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:13,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-09 11:09:13,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:14,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:09:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:14,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:14,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-09 11:09:14,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856483590] [2020-10-09 11:09:14,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:09:14,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:14,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:09:14,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:09:14,068 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-10-09 11:09:16,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:16,008 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-09 11:09:16,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-09 11:09:16,009 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-09 11:09:16,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:16,010 INFO L225 Difference]: With dead ends: 124 [2020-10-09 11:09:16,010 INFO L226 Difference]: Without dead ends: 119 [2020-10-09 11:09:16,010 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-10-09 11:09:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-09 11:09:16,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-10-09 11:09:16,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-09 11:09:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-09 11:09:16,013 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-10-09 11:09:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:16,013 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-09 11:09:16,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:09:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-09 11:09:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:16,013 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:16,013 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:16,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-09 11:09:16,214 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:16,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-10-09 11:09:16,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:16,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848035050] [2020-10-09 11:09:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:16,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848035050] [2020-10-09 11:09:16,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292079481] [2020-10-09 11:09:16,609 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 [2020-10-09 11:09:16,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:09:16,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:16,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:16,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:16,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:09:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:16,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:16,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-09 11:09:16,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088484045] [2020-10-09 11:09:16,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:09:16,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:16,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:09:16,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:09:16,738 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 26 states. [2020-10-09 11:09:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:18,854 INFO L93 Difference]: Finished difference Result 102 states and 261 transitions. [2020-10-09 11:09:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-09 11:09:18,859 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-09 11:09:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:18,860 INFO L225 Difference]: With dead ends: 102 [2020-10-09 11:09:18,860 INFO L226 Difference]: Without dead ends: 97 [2020-10-09 11:09:18,860 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-10-09 11:09:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-09 11:09:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-10-09 11:09:18,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-09 11:09:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-10-09 11:09:18,862 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 29 [2020-10-09 11:09:18,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:18,862 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-10-09 11:09:18,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:09:18,863 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-10-09 11:09:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:18,863 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:18,863 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:19,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:19,068 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:19,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:19,069 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-10-09 11:09:19,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:19,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977499738] [2020-10-09 11:09:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:19,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977499738] [2020-10-09 11:09:19,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94775192] [2020-10-09 11:09:19,735 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 [2020-10-09 11:09:19,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-09 11:09:19,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:19,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:19,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:19,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:19,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-09 11:09:19,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621544058] [2020-10-09 11:09:19,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:09:19,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:19,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:09:19,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:09:19,812 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 25 states. [2020-10-09 11:09:20,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:20,689 INFO L93 Difference]: Finished difference Result 108 states and 251 transitions. [2020-10-09 11:09:20,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 11:09:20,691 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-09 11:09:20,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:20,692 INFO L225 Difference]: With dead ends: 108 [2020-10-09 11:09:20,692 INFO L226 Difference]: Without dead ends: 102 [2020-10-09 11:09:20,692 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2020-10-09 11:09:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-09 11:09:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-10-09 11:09:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-09 11:09:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-10-09 11:09:20,695 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 29 [2020-10-09 11:09:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:20,695 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-10-09 11:09:20,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:09:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-10-09 11:09:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:20,696 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:20,696 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:20,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:20,905 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:20,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:20,905 INFO L82 PathProgramCache]: Analyzing trace with hash -972903182, now seen corresponding path program 240 times [2020-10-09 11:09:20,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:20,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347607982] [2020-10-09 11:09:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:21,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347607982] [2020-10-09 11:09:21,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619591112] [2020-10-09 11:09:21,478 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:21,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-09 11:09:21,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:21,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:21,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:21,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:09:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:21,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:21,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-09 11:09:21,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586369749] [2020-10-09 11:09:21,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:09:21,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:21,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:09:21,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:09:21,586 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 26 states. [2020-10-09 11:09:22,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:22,567 INFO L93 Difference]: Finished difference Result 130 states and 295 transitions. [2020-10-09 11:09:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 11:09:22,568 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-09 11:09:22,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:22,569 INFO L225 Difference]: With dead ends: 130 [2020-10-09 11:09:22,569 INFO L226 Difference]: Without dead ends: 124 [2020-10-09 11:09:22,569 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=672, Invalid=1584, Unknown=0, NotChecked=0, Total=2256 [2020-10-09 11:09:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-09 11:09:22,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2020-10-09 11:09:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-09 11:09:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2020-10-09 11:09:22,571 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 29 [2020-10-09 11:09:22,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:22,571 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2020-10-09 11:09:22,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:09:22,572 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2020-10-09 11:09:22,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:22,572 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:22,572 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:22,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:22,773 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:22,773 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 241 times [2020-10-09 11:09:22,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:22,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021318523] [2020-10-09 11:09:22,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:23,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021318523] [2020-10-09 11:09:23,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207718363] [2020-10-09 11:09:23,329 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:23,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:23,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:23,391 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:23,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:23,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-09 11:09:23,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138296125] [2020-10-09 11:09:23,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:09:23,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:23,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:09:23,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:09:23,393 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 25 states. [2020-10-09 11:09:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:24,430 INFO L93 Difference]: Finished difference Result 131 states and 299 transitions. [2020-10-09 11:09:24,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 11:09:24,431 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-09 11:09:24,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:24,432 INFO L225 Difference]: With dead ends: 131 [2020-10-09 11:09:24,432 INFO L226 Difference]: Without dead ends: 125 [2020-10-09 11:09:24,432 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=674, Invalid=1678, Unknown=0, NotChecked=0, Total=2352 [2020-10-09 11:09:24,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-09 11:09:24,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2020-10-09 11:09:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-09 11:09:24,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-10-09 11:09:24,434 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 29 [2020-10-09 11:09:24,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:24,435 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-10-09 11:09:24,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:09:24,435 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-10-09 11:09:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:24,435 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:24,435 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:24,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:24,636 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:24,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2015097940, now seen corresponding path program 242 times [2020-10-09 11:09:24,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:24,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769581355] [2020-10-09 11:09:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:25,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769581355] [2020-10-09 11:09:25,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893766049] [2020-10-09 11:09:25,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:25,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:09:25,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:25,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:25,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:25,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:09:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:25,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:25,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-09 11:09:25,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019809199] [2020-10-09 11:09:25,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:09:25,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:25,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:09:25,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:09:25,307 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 26 states. [2020-10-09 11:09:26,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:26,421 INFO L93 Difference]: Finished difference Result 149 states and 335 transitions. [2020-10-09 11:09:26,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 11:09:26,422 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-09 11:09:26,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:26,422 INFO L225 Difference]: With dead ends: 149 [2020-10-09 11:09:26,422 INFO L226 Difference]: Without dead ends: 143 [2020-10-09 11:09:26,423 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=712, Invalid=1838, Unknown=0, NotChecked=0, Total=2550 [2020-10-09 11:09:26,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-09 11:09:26,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 78. [2020-10-09 11:09:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-09 11:09:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 193 transitions. [2020-10-09 11:09:26,425 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 193 transitions. Word has length 29 [2020-10-09 11:09:26,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:26,425 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 193 transitions. [2020-10-09 11:09:26,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:09:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 193 transitions. [2020-10-09 11:09:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:26,425 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:26,425 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:26,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-09 11:09:26,626 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:26,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:26,627 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 243 times [2020-10-09 11:09:26,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:26,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805697031] [2020-10-09 11:09:26,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:27,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805697031] [2020-10-09 11:09:27,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117064266] [2020-10-09 11:09:27,155 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:27,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-09 11:09:27,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:27,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:27,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:27,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:27,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-09 11:09:27,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930711534] [2020-10-09 11:09:27,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:09:27,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:27,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:09:27,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:09:27,231 INFO L87 Difference]: Start difference. First operand 78 states and 193 transitions. Second operand 25 states. [2020-10-09 11:09:28,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:28,414 INFO L93 Difference]: Finished difference Result 149 states and 337 transitions. [2020-10-09 11:09:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:09:28,416 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-09 11:09:28,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:28,416 INFO L225 Difference]: With dead ends: 149 [2020-10-09 11:09:28,416 INFO L226 Difference]: Without dead ends: 143 [2020-10-09 11:09:28,417 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=728, Invalid=1924, Unknown=0, NotChecked=0, Total=2652 [2020-10-09 11:09:28,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-09 11:09:28,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 81. [2020-10-09 11:09:28,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-09 11:09:28,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 201 transitions. [2020-10-09 11:09:28,419 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 201 transitions. Word has length 29 [2020-10-09 11:09:28,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:28,419 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 201 transitions. [2020-10-09 11:09:28,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:09:28,419 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 201 transitions. [2020-10-09 11:09:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:28,419 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:28,420 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:28,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-10-09 11:09:28,620 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:28,621 INFO L82 PathProgramCache]: Analyzing trace with hash -716985290, now seen corresponding path program 244 times [2020-10-09 11:09:28,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:28,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107201905] [2020-10-09 11:09:28,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:29,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107201905] [2020-10-09 11:09:29,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841753242] [2020-10-09 11:09:29,123 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:29,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:09:29,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:29,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:29,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:29,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:09:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:29,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:29,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-09 11:09:29,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720074691] [2020-10-09 11:09:29,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:09:29,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:29,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:09:29,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:09:29,228 INFO L87 Difference]: Start difference. First operand 81 states and 201 transitions. Second operand 26 states. [2020-10-09 11:09:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:30,533 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-10-09 11:09:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 11:09:30,534 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-09 11:09:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:30,534 INFO L225 Difference]: With dead ends: 146 [2020-10-09 11:09:30,534 INFO L226 Difference]: Without dead ends: 140 [2020-10-09 11:09:30,535 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=731, Invalid=2025, Unknown=0, NotChecked=0, Total=2756 [2020-10-09 11:09:30,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-09 11:09:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 80. [2020-10-09 11:09:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-09 11:09:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2020-10-09 11:09:30,538 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 29 [2020-10-09 11:09:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:30,538 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2020-10-09 11:09:30,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:09:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2020-10-09 11:09:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:30,539 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:30,539 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:30,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-09 11:09:30,743 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:30,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:30,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 245 times [2020-10-09 11:09:30,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:30,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426856300] [2020-10-09 11:09:30,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:31,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426856300] [2020-10-09 11:09:31,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727801040] [2020-10-09 11:09:31,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:31,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-09 11:09:31,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:31,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:31,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:31,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:31,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-09 11:09:31,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208859532] [2020-10-09 11:09:31,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:09:31,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:31,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:09:31,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:09:31,283 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand 25 states. [2020-10-09 11:09:32,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:32,554 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-10-09 11:09:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-09 11:09:32,556 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-09 11:09:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:32,557 INFO L225 Difference]: With dead ends: 147 [2020-10-09 11:09:32,557 INFO L226 Difference]: Without dead ends: 141 [2020-10-09 11:09:32,557 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=762, Invalid=2100, Unknown=0, NotChecked=0, Total=2862 [2020-10-09 11:09:32,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-09 11:09:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 83. [2020-10-09 11:09:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-09 11:09:32,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-10-09 11:09:32,559 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 29 [2020-10-09 11:09:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:32,559 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-10-09 11:09:32,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:09:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-10-09 11:09:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:32,560 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:32,560 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:32,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-09 11:09:32,761 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:32,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1465644184, now seen corresponding path program 246 times [2020-10-09 11:09:32,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:32,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751987779] [2020-10-09 11:09:32,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:33,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751987779] [2020-10-09 11:09:33,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080162172] [2020-10-09 11:09:33,276 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:33,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-09 11:09:33,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:33,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:33,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:33,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:09:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:33,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:33,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-09 11:09:33,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450587395] [2020-10-09 11:09:33,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:09:33,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:33,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:09:33,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:09:33,387 INFO L87 Difference]: Start difference. First operand 83 states and 207 transitions. Second operand 26 states. [2020-10-09 11:09:34,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:34,810 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2020-10-09 11:09:34,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 11:09:34,812 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-09 11:09:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:34,812 INFO L225 Difference]: With dead ends: 144 [2020-10-09 11:09:34,812 INFO L226 Difference]: Without dead ends: 138 [2020-10-09 11:09:34,812 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2020-10-09 11:09:34,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-09 11:09:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-10-09 11:09:34,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-09 11:09:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 205 transitions. [2020-10-09 11:09:34,814 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 205 transitions. Word has length 29 [2020-10-09 11:09:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:34,814 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 205 transitions. [2020-10-09 11:09:34,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:09:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 205 transitions. [2020-10-09 11:09:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:34,815 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:34,815 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:35,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:35,015 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:35,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 247 times [2020-10-09 11:09:35,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:35,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460016014] [2020-10-09 11:09:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:35,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460016014] [2020-10-09 11:09:35,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179126802] [2020-10-09 11:09:35,513 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:35,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:35,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:35,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:35,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-09 11:09:35,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890964205] [2020-10-09 11:09:35,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:09:35,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:35,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:09:35,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:09:35,592 INFO L87 Difference]: Start difference. First operand 82 states and 205 transitions. Second operand 25 states. [2020-10-09 11:09:36,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:36,888 INFO L93 Difference]: Finished difference Result 145 states and 333 transitions. [2020-10-09 11:09:36,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 11:09:36,889 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-09 11:09:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:36,890 INFO L225 Difference]: With dead ends: 145 [2020-10-09 11:09:36,890 INFO L226 Difference]: Without dead ends: 139 [2020-10-09 11:09:36,891 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2020-10-09 11:09:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-09 11:09:36,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 85. [2020-10-09 11:09:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-09 11:09:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 213 transitions. [2020-10-09 11:09:36,894 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 213 transitions. Word has length 29 [2020-10-09 11:09:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:36,894 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 213 transitions. [2020-10-09 11:09:36,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:09:36,894 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 213 transitions. [2020-10-09 11:09:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:36,895 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:36,895 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:37,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-10-09 11:09:37,105 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:37,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:37,105 INFO L82 PathProgramCache]: Analyzing trace with hash -900797062, now seen corresponding path program 248 times [2020-10-09 11:09:37,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:37,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311720188] [2020-10-09 11:09:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:37,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311720188] [2020-10-09 11:09:37,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510649723] [2020-10-09 11:09:37,607 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:37,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:09:37,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:37,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:37,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:37,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:09:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:37,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:37,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-09 11:09:37,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117691387] [2020-10-09 11:09:37,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:09:37,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:37,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:09:37,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:09:37,719 INFO L87 Difference]: Start difference. First operand 85 states and 213 transitions. Second operand 26 states. [2020-10-09 11:09:39,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:39,274 INFO L93 Difference]: Finished difference Result 142 states and 327 transitions. [2020-10-09 11:09:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 11:09:39,276 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-09 11:09:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:39,276 INFO L225 Difference]: With dead ends: 142 [2020-10-09 11:09:39,277 INFO L226 Difference]: Without dead ends: 136 [2020-10-09 11:09:39,277 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-10-09 11:09:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-09 11:09:39,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-10-09 11:09:39,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-09 11:09:39,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2020-10-09 11:09:39,279 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 29 [2020-10-09 11:09:39,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:39,279 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2020-10-09 11:09:39,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:09:39,280 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2020-10-09 11:09:39,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:39,280 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:39,280 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:39,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:39,481 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:39,481 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 249 times [2020-10-09 11:09:39,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:39,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383269465] [2020-10-09 11:09:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:39,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383269465] [2020-10-09 11:09:39,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862294749] [2020-10-09 11:09:39,956 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:40,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-09 11:09:40,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:40,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:40,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:40,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:40,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-09 11:09:40,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277611493] [2020-10-09 11:09:40,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:09:40,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:40,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:09:40,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:09:40,055 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand 25 states. [2020-10-09 11:09:41,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:41,476 INFO L93 Difference]: Finished difference Result 143 states and 331 transitions. [2020-10-09 11:09:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-09 11:09:41,479 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-09 11:09:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:41,479 INFO L225 Difference]: With dead ends: 143 [2020-10-09 11:09:41,479 INFO L226 Difference]: Without dead ends: 137 [2020-10-09 11:09:41,480 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=878, Invalid=2428, Unknown=0, NotChecked=0, Total=3306 [2020-10-09 11:09:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-09 11:09:41,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2020-10-09 11:09:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-09 11:09:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 219 transitions. [2020-10-09 11:09:41,482 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 219 transitions. Word has length 29 [2020-10-09 11:09:41,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:41,482 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 219 transitions. [2020-10-09 11:09:41,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:09:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 219 transitions. [2020-10-09 11:09:41,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:41,482 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:41,483 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:41,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:41,683 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:41,684 INFO L82 PathProgramCache]: Analyzing trace with hash 772716252, now seen corresponding path program 250 times [2020-10-09 11:09:41,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:41,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114245216] [2020-10-09 11:09:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:42,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114245216] [2020-10-09 11:09:42,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814667698] [2020-10-09 11:09:42,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:42,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:09:42,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:42,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:42,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:42,269 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:09:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:42,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:42,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-09 11:09:42,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202341730] [2020-10-09 11:09:42,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:09:42,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:42,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:09:42,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:09:42,293 INFO L87 Difference]: Start difference. First operand 87 states and 219 transitions. Second operand 26 states. [2020-10-09 11:09:43,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:43,960 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2020-10-09 11:09:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-09 11:09:43,961 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-09 11:09:43,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:43,962 INFO L225 Difference]: With dead ends: 140 [2020-10-09 11:09:43,962 INFO L226 Difference]: Without dead ends: 134 [2020-10-09 11:09:43,962 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=884, Invalid=2538, Unknown=0, NotChecked=0, Total=3422 [2020-10-09 11:09:43,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-09 11:09:43,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2020-10-09 11:09:43,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-09 11:09:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 217 transitions. [2020-10-09 11:09:43,964 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 217 transitions. Word has length 29 [2020-10-09 11:09:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:43,964 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 217 transitions. [2020-10-09 11:09:43,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:09:43,964 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 217 transitions. [2020-10-09 11:09:43,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:43,965 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:43,965 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:44,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:44,166 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:44,167 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 251 times [2020-10-09 11:09:44,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:44,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483407876] [2020-10-09 11:09:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:44,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483407876] [2020-10-09 11:09:44,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780249542] [2020-10-09 11:09:44,673 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:44,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-09 11:09:44,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:44,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:44,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:44,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:44,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-09 11:09:44,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478035539] [2020-10-09 11:09:44,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:09:44,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:44,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:09:44,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:09:44,758 INFO L87 Difference]: Start difference. First operand 86 states and 217 transitions. Second operand 25 states. [2020-10-09 11:09:46,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:46,305 INFO L93 Difference]: Finished difference Result 141 states and 329 transitions. [2020-10-09 11:09:46,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-09 11:09:46,307 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-09 11:09:46,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:46,307 INFO L225 Difference]: With dead ends: 141 [2020-10-09 11:09:46,307 INFO L226 Difference]: Without dead ends: 135 [2020-10-09 11:09:46,308 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=960, Invalid=2580, Unknown=0, NotChecked=0, Total=3540 [2020-10-09 11:09:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-09 11:09:46,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 89. [2020-10-09 11:09:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-09 11:09:46,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-10-09 11:09:46,310 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 29 [2020-10-09 11:09:46,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:46,310 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-10-09 11:09:46,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:09:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-10-09 11:09:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:46,311 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:46,311 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:46,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:46,514 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:46,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:46,515 INFO L82 PathProgramCache]: Analyzing trace with hash 412446910, now seen corresponding path program 252 times [2020-10-09 11:09:46,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:46,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708983253] [2020-10-09 11:09:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:47,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708983253] [2020-10-09 11:09:47,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003579877] [2020-10-09 11:09:47,003 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:47,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-09 11:09:47,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:47,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:47,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:47,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:09:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:47,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:47,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-09 11:09:47,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923402528] [2020-10-09 11:09:47,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:09:47,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:47,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:09:47,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:09:47,135 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 26 states. [2020-10-09 11:09:48,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:48,998 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2020-10-09 11:09:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-09 11:09:48,999 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-09 11:09:48,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:48,999 INFO L225 Difference]: With dead ends: 138 [2020-10-09 11:09:48,999 INFO L226 Difference]: Without dead ends: 132 [2020-10-09 11:09:48,999 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=967, Invalid=2693, Unknown=0, NotChecked=0, Total=3660 [2020-10-09 11:09:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-09 11:09:49,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 88. [2020-10-09 11:09:49,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-09 11:09:49,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-10-09 11:09:49,003 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 29 [2020-10-09 11:09:49,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:49,004 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-10-09 11:09:49,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:09:49,004 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-10-09 11:09:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:49,004 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:49,004 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:49,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:49,205 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:49,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:49,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 253 times [2020-10-09 11:09:49,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:49,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227802416] [2020-10-09 11:09:49,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:49,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227802416] [2020-10-09 11:09:49,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066108372] [2020-10-09 11:09:49,670 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:49,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:49,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:49,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:49,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-09 11:09:49,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952079951] [2020-10-09 11:09:49,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:09:49,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:49,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:09:49,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:09:49,770 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 25 states. [2020-10-09 11:09:51,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:51,486 INFO L93 Difference]: Finished difference Result 139 states and 327 transitions. [2020-10-09 11:09:51,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-09 11:09:51,487 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-09 11:09:51,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:51,487 INFO L225 Difference]: With dead ends: 139 [2020-10-09 11:09:51,487 INFO L226 Difference]: Without dead ends: 133 [2020-10-09 11:09:51,488 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1058, Invalid=2724, Unknown=0, NotChecked=0, Total=3782 [2020-10-09 11:09:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-09 11:09:51,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2020-10-09 11:09:51,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-09 11:09:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 231 transitions. [2020-10-09 11:09:51,489 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 231 transitions. Word has length 29 [2020-10-09 11:09:51,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:51,490 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 231 transitions. [2020-10-09 11:09:51,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:09:51,490 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 231 transitions. [2020-10-09 11:09:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:51,490 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:51,491 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:51,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-10-09 11:09:51,697 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:51,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1746584800, now seen corresponding path program 254 times [2020-10-09 11:09:51,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:51,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931396364] [2020-10-09 11:09:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:52,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931396364] [2020-10-09 11:09:52,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894235273] [2020-10-09 11:09:52,183 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:52,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:09:52,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:52,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:52,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:52,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:09:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:52,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:52,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-09 11:09:52,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313658110] [2020-10-09 11:09:52,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:09:52,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:52,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:09:52,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:09:52,304 INFO L87 Difference]: Start difference. First operand 91 states and 231 transitions. Second operand 26 states. [2020-10-09 11:09:54,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:54,402 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2020-10-09 11:09:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-09 11:09:54,404 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-09 11:09:54,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:54,405 INFO L225 Difference]: With dead ends: 136 [2020-10-09 11:09:54,405 INFO L226 Difference]: Without dead ends: 130 [2020-10-09 11:09:54,406 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1066, Invalid=2840, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 11:09:54,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-09 11:09:54,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2020-10-09 11:09:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-09 11:09:54,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-10-09 11:09:54,408 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 29 [2020-10-09 11:09:54,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:54,408 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-10-09 11:09:54,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:09:54,409 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-10-09 11:09:54,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:54,409 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:54,409 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:54,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-09 11:09:54,616 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:54,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:54,617 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 255 times [2020-10-09 11:09:54,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:54,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123212997] [2020-10-09 11:09:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:55,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123212997] [2020-10-09 11:09:55,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467394150] [2020-10-09 11:09:55,056 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:55,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-09 11:09:55,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:55,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:55,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:55,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:55,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-09 11:09:55,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167833765] [2020-10-09 11:09:55,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:09:55,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:55,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:09:55,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:09:55,162 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 25 states. [2020-10-09 11:09:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:09:56,999 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-09 11:09:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-09 11:09:57,001 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-09 11:09:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:09:57,001 INFO L225 Difference]: With dead ends: 137 [2020-10-09 11:09:57,001 INFO L226 Difference]: Without dead ends: 131 [2020-10-09 11:09:57,002 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1172, Invalid=2860, Unknown=0, NotChecked=0, Total=4032 [2020-10-09 11:09:57,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-09 11:09:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-10-09 11:09:57,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-09 11:09:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-09 11:09:57,004 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 29 [2020-10-09 11:09:57,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:09:57,004 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-09 11:09:57,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:09:57,004 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-09 11:09:57,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:09:57,004 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:09:57,004 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:09:57,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-09 11:09:57,205 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:09:57,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:09:57,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1811401214, now seen corresponding path program 256 times [2020-10-09 11:09:57,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:09:57,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098867144] [2020-10-09 11:09:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:09:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:09:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:57,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098867144] [2020-10-09 11:09:57,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253554903] [2020-10-09 11:09:57,616 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:09:57,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:09:57,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:09:57,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:09:57,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:09:57,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:09:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:09:57,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:09:57,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-09 11:09:57,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232170087] [2020-10-09 11:09:57,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:09:57,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:09:57,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:09:57,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:09:57,767 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 26 states. [2020-10-09 11:10:00,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:00,053 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-09 11:10:00,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-09 11:10:00,055 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-09 11:10:00,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:00,056 INFO L225 Difference]: With dead ends: 134 [2020-10-09 11:10:00,056 INFO L226 Difference]: Without dead ends: 128 [2020-10-09 11:10:00,056 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1181, Invalid=2979, Unknown=0, NotChecked=0, Total=4160 [2020-10-09 11:10:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-09 11:10:00,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2020-10-09 11:10:00,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 11:10:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-09 11:10:00,058 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 29 [2020-10-09 11:10:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:00,058 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-09 11:10:00,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:10:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-09 11:10:00,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:10:00,058 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:00,058 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:00,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:00,259 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:00,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:00,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 257 times [2020-10-09 11:10:00,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:00,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068976445] [2020-10-09 11:10:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:00,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068976445] [2020-10-09 11:10:00,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103812146] [2020-10-09 11:10:00,696 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:00,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-09 11:10:00,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:00,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:10:00,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:00,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:00,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-09 11:10:00,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785224825] [2020-10-09 11:10:00,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:10:00,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:00,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:10:00,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:10:00,792 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 25 states. [2020-10-09 11:10:02,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:02,698 INFO L93 Difference]: Finished difference Result 135 states and 323 transitions. [2020-10-09 11:10:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-09 11:10:02,700 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-09 11:10:02,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:02,700 INFO L225 Difference]: With dead ends: 135 [2020-10-09 11:10:02,700 INFO L226 Difference]: Without dead ends: 129 [2020-10-09 11:10:02,701 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1302, Invalid=2988, Unknown=0, NotChecked=0, Total=4290 [2020-10-09 11:10:02,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-09 11:10:02,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2020-10-09 11:10:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-09 11:10:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-10-09 11:10:02,703 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 29 [2020-10-09 11:10:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:02,704 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-10-09 11:10:02,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:10:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-10-09 11:10:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:10:02,704 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:02,704 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:02,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-09 11:10:02,905 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:02,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1324318364, now seen corresponding path program 258 times [2020-10-09 11:10:02,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:02,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971851902] [2020-10-09 11:10:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:03,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971851902] [2020-10-09 11:10:03,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086719255] [2020-10-09 11:10:03,367 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:03,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-09 11:10:03,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:03,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:10:03,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:03,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:10:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:03,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:03,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-09 11:10:03,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959776315] [2020-10-09 11:10:03,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:10:03,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:03,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:10:03,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:10:03,536 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-10-09 11:10:05,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:05,939 INFO L93 Difference]: Finished difference Result 132 states and 317 transitions. [2020-10-09 11:10:05,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-09 11:10:05,941 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-09 11:10:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:05,941 INFO L225 Difference]: With dead ends: 132 [2020-10-09 11:10:05,942 INFO L226 Difference]: Without dead ends: 126 [2020-10-09 11:10:05,942 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1312, Invalid=3110, Unknown=0, NotChecked=0, Total=4422 [2020-10-09 11:10:05,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-09 11:10:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-10-09 11:10:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-09 11:10:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-09 11:10:05,944 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 29 [2020-10-09 11:10:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:05,944 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-09 11:10:05,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:10:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-09 11:10:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:10:05,945 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:05,945 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:06,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:06,148 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:06,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 259 times [2020-10-09 11:10:06,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:06,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345806063] [2020-10-09 11:10:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:06,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345806063] [2020-10-09 11:10:06,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496693027] [2020-10-09 11:10:06,623 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:06,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:10:06,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:06,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:06,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-09 11:10:06,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192699769] [2020-10-09 11:10:06,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-09 11:10:06,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:06,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-09 11:10:06,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-10-09 11:10:06,715 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 25 states. [2020-10-09 11:10:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:08,761 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-10-09 11:10:08,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-09 11:10:08,762 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-09 11:10:08,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:08,763 INFO L225 Difference]: With dead ends: 152 [2020-10-09 11:10:08,763 INFO L226 Difference]: Without dead ends: 146 [2020-10-09 11:10:08,764 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1448, Invalid=3108, Unknown=0, NotChecked=0, Total=4556 [2020-10-09 11:10:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-09 11:10:08,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-10-09 11:10:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-09 11:10:08,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 261 transitions. [2020-10-09 11:10:08,766 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 261 transitions. Word has length 29 [2020-10-09 11:10:08,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:08,766 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 261 transitions. [2020-10-09 11:10:08,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-09 11:10:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 261 transitions. [2020-10-09 11:10:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-09 11:10:08,766 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:08,767 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:08,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2020-10-09 11:10:08,969 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:08,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:08,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1323811514, now seen corresponding path program 260 times [2020-10-09 11:10:08,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:08,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318797319] [2020-10-09 11:10:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:08,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:09,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318797319] [2020-10-09 11:10:09,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619145948] [2020-10-09 11:10:09,399 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:09,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:10:09,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:09,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 11:10:09,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:09,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:10:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:09,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:09,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-09 11:10:09,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694152922] [2020-10-09 11:10:09,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:10:09,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:09,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:10:09,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:10:09,530 INFO L87 Difference]: Start difference. First operand 100 states and 261 transitions. Second operand 26 states. [2020-10-09 11:10:12,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:12,001 INFO L93 Difference]: Finished difference Result 133 states and 323 transitions. [2020-10-09 11:10:12,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-09 11:10:12,010 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-09 11:10:12,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:12,010 INFO L225 Difference]: With dead ends: 133 [2020-10-09 11:10:12,010 INFO L226 Difference]: Without dead ends: 125 [2020-10-09 11:10:12,011 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1459, Invalid=3233, Unknown=0, NotChecked=0, Total=4692 [2020-10-09 11:10:12,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-09 11:10:12,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2020-10-09 11:10:12,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-09 11:10:12,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-10-09 11:10:12,013 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-10-09 11:10:12,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:12,013 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-10-09 11:10:12,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:10:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-10-09 11:10:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:12,014 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:12,014 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:12,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:12,222 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:12,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:12,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 261 times [2020-10-09 11:10:12,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:12,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694082733] [2020-10-09 11:10:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:12,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694082733] [2020-10-09 11:10:12,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483546068] [2020-10-09 11:10:12,913 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:12,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-09 11:10:12,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:12,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:12,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:12,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:12,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-09 11:10:12,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606475908] [2020-10-09 11:10:12,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:10:12,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:12,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:10:12,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:10:12,987 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-10-09 11:10:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:14,181 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-10-09 11:10:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 11:10:14,182 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-09 11:10:14,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:14,183 INFO L225 Difference]: With dead ends: 154 [2020-10-09 11:10:14,183 INFO L226 Difference]: Without dead ends: 148 [2020-10-09 11:10:14,183 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=717, Invalid=1635, Unknown=0, NotChecked=0, Total=2352 [2020-10-09 11:10:14,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-09 11:10:14,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2020-10-09 11:10:14,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 11:10:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-09 11:10:14,186 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-09 11:10:14,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:14,186 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-09 11:10:14,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:10:14,186 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-09 11:10:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:14,186 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:14,186 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:14,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:14,387 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:14,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:14,387 INFO L82 PathProgramCache]: Analyzing trace with hash 2085740573, now seen corresponding path program 262 times [2020-10-09 11:10:14,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:14,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382765177] [2020-10-09 11:10:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:15,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382765177] [2020-10-09 11:10:15,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978868302] [2020-10-09 11:10:15,102 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:15,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:10:15,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:15,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:15,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:15,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:10:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:15,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:15,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-09 11:10:15,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740997944] [2020-10-09 11:10:15,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:10:15,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:15,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:10:15,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:10:15,218 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-09 11:10:16,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:16,607 INFO L93 Difference]: Finished difference Result 151 states and 357 transitions. [2020-10-09 11:10:16,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 11:10:16,608 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-09 11:10:16,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:16,609 INFO L225 Difference]: With dead ends: 151 [2020-10-09 11:10:16,609 INFO L226 Difference]: Without dead ends: 145 [2020-10-09 11:10:16,609 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=770, Invalid=1882, Unknown=0, NotChecked=0, Total=2652 [2020-10-09 11:10:16,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-09 11:10:16,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2020-10-09 11:10:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 11:10:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-09 11:10:16,611 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-09 11:10:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:16,611 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-09 11:10:16,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:10:16,611 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-09 11:10:16,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:16,612 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:16,612 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:16,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:16,812 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:16,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:16,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 263 times [2020-10-09 11:10:16,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:16,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343668335] [2020-10-09 11:10:16,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:17,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343668335] [2020-10-09 11:10:17,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031636778] [2020-10-09 11:10:17,478 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:17,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-09 11:10:17,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:17,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:17,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:17,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:17,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-09 11:10:17,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980476426] [2020-10-09 11:10:17,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:10:17,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:17,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:10:17,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:10:17,558 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-09 11:10:18,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:18,944 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-09 11:10:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 11:10:18,946 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-09 11:10:18,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:18,946 INFO L225 Difference]: With dead ends: 148 [2020-10-09 11:10:18,946 INFO L226 Difference]: Without dead ends: 142 [2020-10-09 11:10:18,946 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=720, Invalid=1830, Unknown=0, NotChecked=0, Total=2550 [2020-10-09 11:10:18,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-09 11:10:18,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-10-09 11:10:18,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 11:10:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-09 11:10:18,949 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-09 11:10:18,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:18,949 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-09 11:10:18,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:10:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-09 11:10:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:18,949 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:18,949 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:19,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:19,152 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:19,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:19,152 INFO L82 PathProgramCache]: Analyzing trace with hash 778774399, now seen corresponding path program 264 times [2020-10-09 11:10:19,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:19,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862461127] [2020-10-09 11:10:19,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:19,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862461127] [2020-10-09 11:10:19,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844946588] [2020-10-09 11:10:19,764 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:19,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-09 11:10:19,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:19,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:19,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:19,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:10:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:19,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:19,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-09 11:10:19,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315145433] [2020-10-09 11:10:19,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:10:19,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:19,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:10:19,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:10:19,889 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-09 11:10:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:21,468 INFO L93 Difference]: Finished difference Result 147 states and 349 transitions. [2020-10-09 11:10:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 11:10:21,469 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-09 11:10:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:21,470 INFO L225 Difference]: With dead ends: 147 [2020-10-09 11:10:21,470 INFO L226 Difference]: Without dead ends: 141 [2020-10-09 11:10:21,470 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=780, Invalid=2082, Unknown=0, NotChecked=0, Total=2862 [2020-10-09 11:10:21,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-09 11:10:21,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-10-09 11:10:21,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 11:10:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-09 11:10:21,473 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-09 11:10:21,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:21,473 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-09 11:10:21,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:10:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-09 11:10:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:21,474 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:21,474 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:21,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:21,674 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:21,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:21,675 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 265 times [2020-10-09 11:10:21,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:21,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360168632] [2020-10-09 11:10:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:22,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360168632] [2020-10-09 11:10:22,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697960537] [2020-10-09 11:10:22,252 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:22,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:22,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:22,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:22,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-09 11:10:22,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217507501] [2020-10-09 11:10:22,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:10:22,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:22,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:10:22,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:10:22,331 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-09 11:10:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:23,800 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-10-09 11:10:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:10:23,802 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-09 11:10:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:23,803 INFO L225 Difference]: With dead ends: 144 [2020-10-09 11:10:23,803 INFO L226 Difference]: Without dead ends: 138 [2020-10-09 11:10:23,803 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=739, Invalid=2017, Unknown=0, NotChecked=0, Total=2756 [2020-10-09 11:10:23,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-09 11:10:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2020-10-09 11:10:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 11:10:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-09 11:10:23,806 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-09 11:10:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:23,806 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-09 11:10:23,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:10:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-09 11:10:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:23,806 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:23,806 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:24,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-10-09 11:10:24,007 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:24,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1953308831, now seen corresponding path program 266 times [2020-10-09 11:10:24,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:24,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865715394] [2020-10-09 11:10:24,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:24,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865715394] [2020-10-09 11:10:24,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284692659] [2020-10-09 11:10:24,666 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:24,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:10:24,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:24,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:24,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:24,752 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:10:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:24,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:24,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-09 11:10:24,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183901309] [2020-10-09 11:10:24,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:10:24,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:24,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:10:24,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:10:24,770 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-09 11:10:26,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:26,451 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-10-09 11:10:26,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 11:10:26,453 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-09 11:10:26,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:26,453 INFO L225 Difference]: With dead ends: 143 [2020-10-09 11:10:26,453 INFO L226 Difference]: Without dead ends: 137 [2020-10-09 11:10:26,454 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=806, Invalid=2274, Unknown=0, NotChecked=0, Total=3080 [2020-10-09 11:10:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-09 11:10:26,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2020-10-09 11:10:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 11:10:26,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-09 11:10:26,456 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-09 11:10:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:26,457 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-09 11:10:26,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:10:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-09 11:10:26,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:26,457 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:26,457 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:26,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-09 11:10:26,658 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:26,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:26,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 267 times [2020-10-09 11:10:26,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:26,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848557497] [2020-10-09 11:10:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:27,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848557497] [2020-10-09 11:10:27,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549715385] [2020-10-09 11:10:27,291 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:27,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-09 11:10:27,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:27,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:27,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:27,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:27,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-09 11:10:27,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017648999] [2020-10-09 11:10:27,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:10:27,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:27,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:10:27,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:10:27,371 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-09 11:10:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:28,898 INFO L93 Difference]: Finished difference Result 140 states and 335 transitions. [2020-10-09 11:10:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-09 11:10:28,900 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-09 11:10:28,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:28,900 INFO L225 Difference]: With dead ends: 140 [2020-10-09 11:10:28,900 INFO L226 Difference]: Without dead ends: 134 [2020-10-09 11:10:28,901 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=774, Invalid=2196, Unknown=0, NotChecked=0, Total=2970 [2020-10-09 11:10:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-09 11:10:28,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-10-09 11:10:28,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 11:10:28,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-09 11:10:28,903 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-09 11:10:28,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:28,903 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-09 11:10:28,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:10:28,904 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-09 11:10:28,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:28,904 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:28,904 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:29,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-10-09 11:10:29,105 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:29,105 INFO L82 PathProgramCache]: Analyzing trace with hash 229320643, now seen corresponding path program 268 times [2020-10-09 11:10:29,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:29,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188085952] [2020-10-09 11:10:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:29,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188085952] [2020-10-09 11:10:29,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015107989] [2020-10-09 11:10:29,746 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:29,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:10:29,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:29,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:29,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:29,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:10:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:29,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:29,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-09 11:10:29,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254989275] [2020-10-09 11:10:29,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:10:29,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:29,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:10:29,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:10:29,867 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-09 11:10:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:31,805 INFO L93 Difference]: Finished difference Result 139 states and 333 transitions. [2020-10-09 11:10:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 11:10:31,807 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-09 11:10:31,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:31,807 INFO L225 Difference]: With dead ends: 139 [2020-10-09 11:10:31,807 INFO L226 Difference]: Without dead ends: 133 [2020-10-09 11:10:31,808 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=848, Invalid=2458, Unknown=0, NotChecked=0, Total=3306 [2020-10-09 11:10:31,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-09 11:10:31,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2020-10-09 11:10:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 11:10:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-09 11:10:31,810 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-09 11:10:31,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:31,810 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-09 11:10:31,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:10:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-09 11:10:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:31,810 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:31,810 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:32,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-09 11:10:32,011 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:32,012 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 269 times [2020-10-09 11:10:32,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:32,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129124824] [2020-10-09 11:10:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:32,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129124824] [2020-10-09 11:10:32,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909738394] [2020-10-09 11:10:32,635 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:32,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-09 11:10:32,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:32,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:32,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:32,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-09 11:10:32,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894229356] [2020-10-09 11:10:32,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:10:32,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:32,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:10:32,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:10:32,723 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-09 11:10:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:34,364 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-09 11:10:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 11:10:34,367 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-09 11:10:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:34,367 INFO L225 Difference]: With dead ends: 136 [2020-10-09 11:10:34,367 INFO L226 Difference]: Without dead ends: 130 [2020-10-09 11:10:34,368 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=825, Invalid=2367, Unknown=0, NotChecked=0, Total=3192 [2020-10-09 11:10:34,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-09 11:10:34,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2020-10-09 11:10:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 11:10:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-09 11:10:34,370 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-09 11:10:34,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:34,370 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-09 11:10:34,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:10:34,370 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-09 11:10:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:34,370 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:34,371 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:34,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:34,571 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:34,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:34,572 INFO L82 PathProgramCache]: Analyzing trace with hash -2137120603, now seen corresponding path program 270 times [2020-10-09 11:10:34,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:34,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528969703] [2020-10-09 11:10:34,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:35,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528969703] [2020-10-09 11:10:35,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440086620] [2020-10-09 11:10:35,202 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:35,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-09 11:10:35,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:35,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:35,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:35,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:10:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:35,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:35,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-09 11:10:35,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191559328] [2020-10-09 11:10:35,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:10:35,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:35,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:10:35,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:10:35,345 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-09 11:10:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:37,361 INFO L93 Difference]: Finished difference Result 135 states and 325 transitions. [2020-10-09 11:10:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-09 11:10:37,363 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-09 11:10:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:37,364 INFO L225 Difference]: With dead ends: 135 [2020-10-09 11:10:37,364 INFO L226 Difference]: Without dead ends: 129 [2020-10-09 11:10:37,364 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-10-09 11:10:37,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-09 11:10:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2020-10-09 11:10:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 11:10:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-09 11:10:37,366 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-09 11:10:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:37,367 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-09 11:10:37,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:10:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-09 11:10:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:37,367 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:37,367 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:37,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-10-09 11:10:37,568 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:37,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 271 times [2020-10-09 11:10:37,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:37,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779504342] [2020-10-09 11:10:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:38,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779504342] [2020-10-09 11:10:38,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422929391] [2020-10-09 11:10:38,183 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:38,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:38,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:38,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:38,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-09 11:10:38,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512870016] [2020-10-09 11:10:38,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:10:38,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:38,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:10:38,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:10:38,265 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-09 11:10:40,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:40,073 INFO L93 Difference]: Finished difference Result 132 states and 319 transitions. [2020-10-09 11:10:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-09 11:10:40,074 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-09 11:10:40,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:40,075 INFO L225 Difference]: With dead ends: 132 [2020-10-09 11:10:40,075 INFO L226 Difference]: Without dead ends: 126 [2020-10-09 11:10:40,075 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-10-09 11:10:40,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-09 11:10:40,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-10-09 11:10:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 11:10:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-09 11:10:40,077 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-09 11:10:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:40,077 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-09 11:10:40,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:10:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-09 11:10:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:40,078 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:40,078 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:40,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:40,278 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:40,279 INFO L82 PathProgramCache]: Analyzing trace with hash -463607289, now seen corresponding path program 272 times [2020-10-09 11:10:40,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:40,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079647547] [2020-10-09 11:10:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:40,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079647547] [2020-10-09 11:10:40,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563370201] [2020-10-09 11:10:40,910 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:40,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:10:40,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:40,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:40,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:41,010 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:10:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:41,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:41,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-09 11:10:41,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778400951] [2020-10-09 11:10:41,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:10:41,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:41,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:10:41,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:10:41,038 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-09 11:10:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:43,276 INFO L93 Difference]: Finished difference Result 131 states and 317 transitions. [2020-10-09 11:10:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-09 11:10:43,278 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-09 11:10:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:43,278 INFO L225 Difference]: With dead ends: 131 [2020-10-09 11:10:43,279 INFO L226 Difference]: Without dead ends: 125 [2020-10-09 11:10:43,279 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=980, Invalid=2802, Unknown=0, NotChecked=0, Total=3782 [2020-10-09 11:10:43,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-09 11:10:43,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2020-10-09 11:10:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 11:10:43,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-09 11:10:43,281 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-09 11:10:43,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:43,282 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-09 11:10:43,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:10:43,282 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-09 11:10:43,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:43,282 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:43,282 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:43,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:43,483 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:43,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:43,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 273 times [2020-10-09 11:10:43,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:43,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149751186] [2020-10-09 11:10:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:44,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149751186] [2020-10-09 11:10:44,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545079372] [2020-10-09 11:10:44,074 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:44,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-09 11:10:44,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:44,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:44,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:44,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:44,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-09 11:10:44,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165523432] [2020-10-09 11:10:44,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:10:44,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:44,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:10:44,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:10:44,168 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-09 11:10:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:46,131 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-10-09 11:10:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-09 11:10:46,132 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-09 11:10:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:46,133 INFO L225 Difference]: With dead ends: 128 [2020-10-09 11:10:46,133 INFO L226 Difference]: Without dead ends: 122 [2020-10-09 11:10:46,134 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=975, Invalid=2685, Unknown=0, NotChecked=0, Total=3660 [2020-10-09 11:10:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-09 11:10:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-10-09 11:10:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 11:10:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-09 11:10:46,136 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-09 11:10:46,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:46,136 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-09 11:10:46,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:10:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-09 11:10:46,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:46,137 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:46,137 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:46,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:46,338 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:46,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:46,339 INFO L82 PathProgramCache]: Analyzing trace with hash -823876631, now seen corresponding path program 274 times [2020-10-09 11:10:46,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:46,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103056748] [2020-10-09 11:10:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:46,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103056748] [2020-10-09 11:10:46,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586842317] [2020-10-09 11:10:46,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:46,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:10:46,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:46,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:47,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:10:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:47,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:47,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-09 11:10:47,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301449571] [2020-10-09 11:10:47,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:10:47,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:47,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:10:47,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:10:47,073 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-09 11:10:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:49,580 INFO L93 Difference]: Finished difference Result 127 states and 309 transitions. [2020-10-09 11:10:49,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-09 11:10:49,582 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-09 11:10:49,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:49,589 INFO L225 Difference]: With dead ends: 127 [2020-10-09 11:10:49,589 INFO L226 Difference]: Without dead ends: 121 [2020-10-09 11:10:49,590 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1070, Invalid=2962, Unknown=0, NotChecked=0, Total=4032 [2020-10-09 11:10:49,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-09 11:10:49,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2020-10-09 11:10:49,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 11:10:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-09 11:10:49,591 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-09 11:10:49,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:49,591 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-09 11:10:49,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:10:49,591 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-09 11:10:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:49,592 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:49,592 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:49,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:49,793 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:49,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:49,794 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 275 times [2020-10-09 11:10:49,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:49,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689266668] [2020-10-09 11:10:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:50,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689266668] [2020-10-09 11:10:50,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362304392] [2020-10-09 11:10:50,338 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:50,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-09 11:10:50,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:50,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:50,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:50,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:50,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-09 11:10:50,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500624589] [2020-10-09 11:10:50,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:10:50,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:50,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:10:50,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:10:50,433 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-09 11:10:52,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:52,628 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-09 11:10:52,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-09 11:10:52,630 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-09 11:10:52,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:52,630 INFO L225 Difference]: With dead ends: 124 [2020-10-09 11:10:52,631 INFO L226 Difference]: Without dead ends: 118 [2020-10-09 11:10:52,631 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1074, Invalid=2832, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 11:10:52,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-09 11:10:52,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2020-10-09 11:10:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 11:10:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-09 11:10:52,633 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-09 11:10:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:52,633 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-09 11:10:52,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:10:52,633 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-09 11:10:52,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:52,633 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:52,634 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:52,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-10-09 11:10:52,834 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:52,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:52,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1312058955, now seen corresponding path program 276 times [2020-10-09 11:10:52,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:52,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749973641] [2020-10-09 11:10:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:53,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749973641] [2020-10-09 11:10:53,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959954227] [2020-10-09 11:10:53,360 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:53,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-09 11:10:53,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:10:53,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:53,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:53,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:10:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:53,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:53,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-09 11:10:53,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741806252] [2020-10-09 11:10:53,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:10:53,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:53,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:10:53,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:10:53,513 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-09 11:10:56,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:56,217 INFO L93 Difference]: Finished difference Result 123 states and 301 transitions. [2020-10-09 11:10:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-09 11:10:56,219 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-09 11:10:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:56,219 INFO L225 Difference]: With dead ends: 123 [2020-10-09 11:10:56,220 INFO L226 Difference]: Without dead ends: 117 [2020-10-09 11:10:56,220 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1176, Invalid=3114, Unknown=0, NotChecked=0, Total=4290 [2020-10-09 11:10:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-09 11:10:56,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-09 11:10:56,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 11:10:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-09 11:10:56,222 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-09 11:10:56,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:56,222 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-09 11:10:56,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:10:56,222 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-09 11:10:56,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:56,222 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:56,222 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:56,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-09 11:10:56,423 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:56,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:56,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 277 times [2020-10-09 11:10:56,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:56,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645564548] [2020-10-09 11:10:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:56,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645564548] [2020-10-09 11:10:56,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213216704] [2020-10-09 11:10:56,971 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:10:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:10:57,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:10:57,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:10:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:10:57,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:10:57,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-09 11:10:57,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663072538] [2020-10-09 11:10:57,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:10:57,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:10:57,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:10:57,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:10:57,049 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-09 11:10:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:10:59,345 INFO L93 Difference]: Finished difference Result 120 states and 295 transitions. [2020-10-09 11:10:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-09 11:10:59,348 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-09 11:10:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:10:59,348 INFO L225 Difference]: With dead ends: 120 [2020-10-09 11:10:59,348 INFO L226 Difference]: Without dead ends: 114 [2020-10-09 11:10:59,349 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1189, Invalid=2971, Unknown=0, NotChecked=0, Total=4160 [2020-10-09 11:10:59,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-09 11:10:59,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2020-10-09 11:10:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 11:10:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-09 11:10:59,351 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-09 11:10:59,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:10:59,351 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-09 11:10:59,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:10:59,351 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-09 11:10:59,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:10:59,351 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:10:59,351 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:10:59,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-10-09 11:10:59,552 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:10:59,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:10:59,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1247242541, now seen corresponding path program 278 times [2020-10-09 11:10:59,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:10:59,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877137554] [2020-10-09 11:10:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:10:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:00,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877137554] [2020-10-09 11:11:00,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264447314] [2020-10-09 11:11:00,165 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:00,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:11:00,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:00,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:11:00,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:00,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:11:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:00,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:00,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-09 11:11:00,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453883592] [2020-10-09 11:11:00,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:11:00,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:00,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:11:00,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:11:00,299 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-09 11:11:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:03,131 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-09 11:11:03,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-09 11:11:03,134 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-09 11:11:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:03,134 INFO L225 Difference]: With dead ends: 119 [2020-10-09 11:11:03,134 INFO L226 Difference]: Without dead ends: 113 [2020-10-09 11:11:03,135 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1298, Invalid=3258, Unknown=0, NotChecked=0, Total=4556 [2020-10-09 11:11:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-09 11:11:03,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-10-09 11:11:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 11:11:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-09 11:11:03,137 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-09 11:11:03,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:03,137 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-09 11:11:03,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:11:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-09 11:11:03,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:11:03,137 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:03,137 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:03,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-09 11:11:03,338 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:03,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:03,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 279 times [2020-10-09 11:11:03,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:03,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249666376] [2020-10-09 11:11:03,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:03,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249666376] [2020-10-09 11:11:03,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906300107] [2020-10-09 11:11:03,947 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:04,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-09 11:11:04,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:04,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:11:04,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:04,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:04,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-09 11:11:04,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312655054] [2020-10-09 11:11:04,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:11:04,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:04,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:11:04,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:11:04,056 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-09 11:11:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:06,431 INFO L93 Difference]: Finished difference Result 116 states and 287 transitions. [2020-10-09 11:11:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-09 11:11:06,434 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-09 11:11:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:06,434 INFO L225 Difference]: With dead ends: 116 [2020-10-09 11:11:06,434 INFO L226 Difference]: Without dead ends: 110 [2020-10-09 11:11:06,435 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1320, Invalid=3102, Unknown=0, NotChecked=0, Total=4422 [2020-10-09 11:11:06,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-09 11:11:06,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-10-09 11:11:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 11:11:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-09 11:11:06,437 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-09 11:11:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:06,437 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-09 11:11:06,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:11:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-09 11:11:06,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:11:06,437 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:06,437 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:06,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:06,638 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:06,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:06,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1734325391, now seen corresponding path program 280 times [2020-10-09 11:11:06,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:06,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741916385] [2020-10-09 11:11:06,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:07,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741916385] [2020-10-09 11:11:07,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103721880] [2020-10-09 11:11:07,240 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:07,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:11:07,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:07,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:11:07,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:07,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:11:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:07,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:07,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-09 11:11:07,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894599715] [2020-10-09 11:11:07,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:11:07,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:07,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:11:07,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:11:07,386 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-09 11:11:10,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:10,446 INFO L93 Difference]: Finished difference Result 115 states and 285 transitions. [2020-10-09 11:11:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-09 11:11:10,448 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-09 11:11:10,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:10,448 INFO L225 Difference]: With dead ends: 115 [2020-10-09 11:11:10,449 INFO L226 Difference]: Without dead ends: 109 [2020-10-09 11:11:10,449 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1436, Invalid=3394, Unknown=0, NotChecked=0, Total=4830 [2020-10-09 11:11:10,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-09 11:11:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-09 11:11:10,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 11:11:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-09 11:11:10,451 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-09 11:11:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:10,451 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-09 11:11:10,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:11:10,452 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-09 11:11:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:11:10,452 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:10,452 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:10,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-10-09 11:11:10,653 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:10,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:10,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 281 times [2020-10-09 11:11:10,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:10,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444723811] [2020-10-09 11:11:10,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:11,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444723811] [2020-10-09 11:11:11,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307287940] [2020-10-09 11:11:11,258 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:11,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-09 11:11:11,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:11,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:11:11,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:11,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:11,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-09 11:11:11,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778155259] [2020-10-09 11:11:11,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 11:11:11,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:11,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 11:11:11,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-09 11:11:11,365 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-09 11:11:13,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:13,916 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-10-09 11:11:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-09 11:11:13,919 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-09 11:11:13,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:13,919 INFO L225 Difference]: With dead ends: 131 [2020-10-09 11:11:13,920 INFO L226 Difference]: Without dead ends: 125 [2020-10-09 11:11:13,920 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1467, Invalid=3225, Unknown=0, NotChecked=0, Total=4692 [2020-10-09 11:11:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-09 11:11:13,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2020-10-09 11:11:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-09 11:11:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 265 transitions. [2020-10-09 11:11:13,922 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 265 transitions. Word has length 30 [2020-10-09 11:11:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:13,922 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 265 transitions. [2020-10-09 11:11:13,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-09 11:11:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 265 transitions. [2020-10-09 11:11:13,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:11:13,923 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:13,923 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:14,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:14,124 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:14,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:14,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1734832241, now seen corresponding path program 282 times [2020-10-09 11:11:14,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:14,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531425006] [2020-10-09 11:11:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:14,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531425006] [2020-10-09 11:11:14,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056942135] [2020-10-09 11:11:14,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:14,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-09 11:11:14,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:14,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:11:14,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:14,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:11:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:14,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:14,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-09 11:11:14,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015051080] [2020-10-09 11:11:14,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:11:14,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:14,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:11:14,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:11:14,825 INFO L87 Difference]: Start difference. First operand 102 states and 265 transitions. Second operand 27 states. [2020-10-09 11:11:18,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:18,061 INFO L93 Difference]: Finished difference Result 112 states and 281 transitions. [2020-10-09 11:11:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-09 11:11:18,063 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-09 11:11:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:18,064 INFO L225 Difference]: With dead ends: 112 [2020-10-09 11:11:18,064 INFO L226 Difference]: Without dead ends: 104 [2020-10-09 11:11:18,064 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1590, Invalid=3522, Unknown=0, NotChecked=0, Total=5112 [2020-10-09 11:11:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-09 11:11:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2020-10-09 11:11:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-09 11:11:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 178 transitions. [2020-10-09 11:11:18,066 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 178 transitions. Word has length 30 [2020-10-09 11:11:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:18,066 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 178 transitions. [2020-10-09 11:11:18,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:11:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 178 transitions. [2020-10-09 11:11:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-09 11:11:18,066 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:18,066 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:18,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:18,267 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:18,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:18,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1911532333, now seen corresponding path program 283 times [2020-10-09 11:11:18,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:18,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41470714] [2020-10-09 11:11:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:18,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41470714] [2020-10-09 11:11:18,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668867575] [2020-10-09 11:11:18,885 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:18,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 11:11:18,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:18,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:11:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:19,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:19,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-09 11:11:19,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214293260] [2020-10-09 11:11:19,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:11:19,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:19,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:11:19,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:11:19,047 INFO L87 Difference]: Start difference. First operand 73 states and 178 transitions. Second operand 27 states. [2020-10-09 11:11:22,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:22,102 INFO L93 Difference]: Finished difference Result 132 states and 323 transitions. [2020-10-09 11:11:22,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-09 11:11:22,104 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-09 11:11:22,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:22,104 INFO L225 Difference]: With dead ends: 132 [2020-10-09 11:11:22,104 INFO L226 Difference]: Without dead ends: 127 [2020-10-09 11:11:22,105 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-10-09 11:11:22,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-09 11:11:22,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2020-10-09 11:11:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-09 11:11:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-10-09 11:11:22,107 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 30 [2020-10-09 11:11:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:22,107 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-10-09 11:11:22,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:11:22,107 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-10-09 11:11:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:11:22,107 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:22,107 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:22,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:22,308 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2054759070, now seen corresponding path program 284 times [2020-10-09 11:11:22,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:22,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594848440] [2020-10-09 11:11:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:23,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594848440] [2020-10-09 11:11:23,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696149098] [2020-10-09 11:11:23,003 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:23,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:11:23,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:23,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:11:23,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:23,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:11:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:23,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:23,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-09 11:11:23,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578720201] [2020-10-09 11:11:23,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:11:23,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:23,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:11:23,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:11:23,144 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 28 states. [2020-10-09 11:11:26,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:26,304 INFO L93 Difference]: Finished difference Result 108 states and 277 transitions. [2020-10-09 11:11:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-09 11:11:26,306 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-09 11:11:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:26,306 INFO L225 Difference]: With dead ends: 108 [2020-10-09 11:11:26,306 INFO L226 Difference]: Without dead ends: 103 [2020-10-09 11:11:26,307 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-10-09 11:11:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-09 11:11:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2020-10-09 11:11:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-09 11:11:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-10-09 11:11:26,309 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 31 [2020-10-09 11:11:26,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:26,309 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-10-09 11:11:26,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:11:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-10-09 11:11:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:11:26,309 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:26,309 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:26,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:26,510 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:26,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:26,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 285 times [2020-10-09 11:11:26,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:26,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61353127] [2020-10-09 11:11:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:27,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61353127] [2020-10-09 11:11:27,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559290396] [2020-10-09 11:11:27,407 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:27,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-09 11:11:27,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:27,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:11:27,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:27,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:27,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-09 11:11:27,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086117355] [2020-10-09 11:11:27,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:11:27,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:27,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:11:27,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:11:27,483 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 27 states. [2020-10-09 11:11:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:28,981 INFO L93 Difference]: Finished difference Result 114 states and 265 transitions. [2020-10-09 11:11:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 11:11:28,983 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-09 11:11:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:28,984 INFO L225 Difference]: With dead ends: 114 [2020-10-09 11:11:28,984 INFO L226 Difference]: Without dead ends: 108 [2020-10-09 11:11:28,984 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=783, Invalid=1667, Unknown=0, NotChecked=0, Total=2450 [2020-10-09 11:11:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-09 11:11:28,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-10-09 11:11:28,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-09 11:11:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2020-10-09 11:11:28,986 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 31 [2020-10-09 11:11:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:28,986 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2020-10-09 11:11:28,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:11:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2020-10-09 11:11:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:11:28,987 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:28,987 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:29,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:29,188 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:29,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1342928561, now seen corresponding path program 286 times [2020-10-09 11:11:29,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:29,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311416850] [2020-10-09 11:11:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:30,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311416850] [2020-10-09 11:11:30,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763522368] [2020-10-09 11:11:30,081 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:30,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:11:30,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:30,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:11:30,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:30,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:11:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:30,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:30,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-09 11:11:30,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677298787] [2020-10-09 11:11:30,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:11:30,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:30,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:11:30,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:11:30,203 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand 28 states. [2020-10-09 11:11:31,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:31,881 INFO L93 Difference]: Finished difference Result 138 states and 313 transitions. [2020-10-09 11:11:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 11:11:31,883 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-09 11:11:31,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:31,884 INFO L225 Difference]: With dead ends: 138 [2020-10-09 11:11:31,884 INFO L226 Difference]: Without dead ends: 132 [2020-10-09 11:11:31,884 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=792, Invalid=1860, Unknown=0, NotChecked=0, Total=2652 [2020-10-09 11:11:31,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-09 11:11:31,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-10-09 11:11:31,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-09 11:11:31,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 197 transitions. [2020-10-09 11:11:31,887 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 197 transitions. Word has length 31 [2020-10-09 11:11:31,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:31,887 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 197 transitions. [2020-10-09 11:11:31,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:11:31,887 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 197 transitions. [2020-10-09 11:11:31,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:11:31,887 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:31,887 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:32,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-09 11:11:32,088 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:32,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:32,089 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 287 times [2020-10-09 11:11:32,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:32,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316237418] [2020-10-09 11:11:32,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:32,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316237418] [2020-10-09 11:11:32,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337783843] [2020-10-09 11:11:32,957 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:33,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-09 11:11:33,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:33,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:11:33,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:33,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:33,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-09 11:11:33,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891101395] [2020-10-09 11:11:33,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:11:33,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:33,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:11:33,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:11:33,037 INFO L87 Difference]: Start difference. First operand 80 states and 197 transitions. Second operand 27 states. [2020-10-09 11:11:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:34,659 INFO L93 Difference]: Finished difference Result 139 states and 317 transitions. [2020-10-09 11:11:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:11:34,662 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-09 11:11:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:34,663 INFO L225 Difference]: With dead ends: 139 [2020-10-09 11:11:34,663 INFO L226 Difference]: Without dead ends: 133 [2020-10-09 11:11:34,664 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=793, Invalid=1963, Unknown=0, NotChecked=0, Total=2756 [2020-10-09 11:11:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-09 11:11:34,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 83. [2020-10-09 11:11:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-09 11:11:34,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 205 transitions. [2020-10-09 11:11:34,666 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 205 transitions. Word has length 31 [2020-10-09 11:11:34,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:34,666 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 205 transitions. [2020-10-09 11:11:34,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:11:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 205 transitions. [2020-10-09 11:11:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:11:34,666 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:34,666 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:34,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-09 11:11:34,867 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:34,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:34,868 INFO L82 PathProgramCache]: Analyzing trace with hash -521114221, now seen corresponding path program 288 times [2020-10-09 11:11:34,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:34,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126067780] [2020-10-09 11:11:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:35,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126067780] [2020-10-09 11:11:35,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580729792] [2020-10-09 11:11:35,680 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:35,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-09 11:11:35,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:35,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:11:35,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:35,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:11:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:35,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:35,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-09 11:11:35,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366717099] [2020-10-09 11:11:35,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:11:35,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:35,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:11:35,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:11:35,828 INFO L87 Difference]: Start difference. First operand 83 states and 205 transitions. Second operand 28 states. [2020-10-09 11:11:37,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:37,705 INFO L93 Difference]: Finished difference Result 159 states and 357 transitions. [2020-10-09 11:11:37,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 11:11:37,708 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-09 11:11:37,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:37,709 INFO L225 Difference]: With dead ends: 159 [2020-10-09 11:11:37,709 INFO L226 Difference]: Without dead ends: 153 [2020-10-09 11:11:37,709 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=833, Invalid=2137, Unknown=0, NotChecked=0, Total=2970 [2020-10-09 11:11:37,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-09 11:11:37,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 82. [2020-10-09 11:11:37,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-09 11:11:37,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 203 transitions. [2020-10-09 11:11:37,712 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 203 transitions. Word has length 31 [2020-10-09 11:11:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:37,712 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 203 transitions. [2020-10-09 11:11:37,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:11:37,712 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 203 transitions. [2020-10-09 11:11:37,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:11:37,712 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:37,712 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:37,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-09 11:11:37,913 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:37,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:37,914 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 289 times [2020-10-09 11:11:37,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:37,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132795140] [2020-10-09 11:11:37,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:38,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132795140] [2020-10-09 11:11:38,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606871132] [2020-10-09 11:11:38,692 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:11:38,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:38,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:38,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-09 11:11:38,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860813012] [2020-10-09 11:11:38,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:11:38,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:38,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:11:38,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:11:38,767 INFO L87 Difference]: Start difference. First operand 82 states and 203 transitions. Second operand 27 states. [2020-10-09 11:11:40,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:40,615 INFO L93 Difference]: Finished difference Result 159 states and 359 transitions. [2020-10-09 11:11:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-09 11:11:40,617 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-09 11:11:40,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:40,617 INFO L225 Difference]: With dead ends: 159 [2020-10-09 11:11:40,618 INFO L226 Difference]: Without dead ends: 153 [2020-10-09 11:11:40,618 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=848, Invalid=2232, Unknown=0, NotChecked=0, Total=3080 [2020-10-09 11:11:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-09 11:11:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 85. [2020-10-09 11:11:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-09 11:11:40,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 211 transitions. [2020-10-09 11:11:40,619 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 211 transitions. Word has length 31 [2020-10-09 11:11:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:40,620 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 211 transitions. [2020-10-09 11:11:40,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:11:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 211 transitions. [2020-10-09 11:11:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:11:40,620 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:40,620 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:40,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:40,821 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:40,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:40,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1828080395, now seen corresponding path program 290 times [2020-10-09 11:11:40,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:40,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443639146] [2020-10-09 11:11:40,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:41,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443639146] [2020-10-09 11:11:41,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015542509] [2020-10-09 11:11:41,697 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:41,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:11:41,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:41,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:11:41,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:41,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:11:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:41,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:41,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-09 11:11:41,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045089277] [2020-10-09 11:11:41,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:11:41,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:41,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:11:41,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:11:41,806 INFO L87 Difference]: Start difference. First operand 85 states and 211 transitions. Second operand 28 states. [2020-10-09 11:11:43,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:43,719 INFO L93 Difference]: Finished difference Result 156 states and 353 transitions. [2020-10-09 11:11:43,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 11:11:43,722 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-09 11:11:43,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:43,722 INFO L225 Difference]: With dead ends: 156 [2020-10-09 11:11:43,722 INFO L226 Difference]: Without dead ends: 150 [2020-10-09 11:11:43,723 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=850, Invalid=2342, Unknown=0, NotChecked=0, Total=3192 [2020-10-09 11:11:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-09 11:11:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 84. [2020-10-09 11:11:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-09 11:11:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 209 transitions. [2020-10-09 11:11:43,725 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 209 transitions. Word has length 31 [2020-10-09 11:11:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:43,725 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 209 transitions. [2020-10-09 11:11:43,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:11:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 209 transitions. [2020-10-09 11:11:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:11:43,725 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:43,725 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:43,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:43,926 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:43,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:43,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 291 times [2020-10-09 11:11:43,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:43,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352286264] [2020-10-09 11:11:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:44,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352286264] [2020-10-09 11:11:44,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933168240] [2020-10-09 11:11:44,785 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:44,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-09 11:11:44,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:44,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:11:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:44,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:44,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-09 11:11:44,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157351068] [2020-10-09 11:11:44,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:11:44,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:44,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:11:44,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:11:44,872 INFO L87 Difference]: Start difference. First operand 84 states and 209 transitions. Second operand 27 states. [2020-10-09 11:11:46,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:46,769 INFO L93 Difference]: Finished difference Result 157 states and 357 transitions. [2020-10-09 11:11:46,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 11:11:46,771 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-09 11:11:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:46,771 INFO L225 Difference]: With dead ends: 157 [2020-10-09 11:11:46,771 INFO L226 Difference]: Without dead ends: 151 [2020-10-09 11:11:46,772 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=880, Invalid=2426, Unknown=0, NotChecked=0, Total=3306 [2020-10-09 11:11:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-09 11:11:46,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2020-10-09 11:11:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-09 11:11:46,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 217 transitions. [2020-10-09 11:11:46,774 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 217 transitions. Word has length 31 [2020-10-09 11:11:46,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:46,774 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 217 transitions. [2020-10-09 11:11:46,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:11:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 217 transitions. [2020-10-09 11:11:46,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:11:46,775 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:46,775 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:46,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:46,975 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:46,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:46,976 INFO L82 PathProgramCache]: Analyzing trace with hash -265196329, now seen corresponding path program 292 times [2020-10-09 11:11:46,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:46,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540460793] [2020-10-09 11:11:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:47,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540460793] [2020-10-09 11:11:47,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786015749] [2020-10-09 11:11:47,838 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:47,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:11:47,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:47,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:11:47,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:47,954 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:11:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:47,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:47,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-09 11:11:47,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456396160] [2020-10-09 11:11:47,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:11:47,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:47,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:11:47,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:11:47,982 INFO L87 Difference]: Start difference. First operand 87 states and 217 transitions. Second operand 28 states. [2020-10-09 11:11:50,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:50,123 INFO L93 Difference]: Finished difference Result 154 states and 351 transitions. [2020-10-09 11:11:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 11:11:50,126 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-09 11:11:50,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:50,126 INFO L225 Difference]: With dead ends: 154 [2020-10-09 11:11:50,126 INFO L226 Difference]: Without dead ends: 148 [2020-10-09 11:11:50,127 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=883, Invalid=2539, Unknown=0, NotChecked=0, Total=3422 [2020-10-09 11:11:50,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-09 11:11:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 86. [2020-10-09 11:11:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-09 11:11:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 215 transitions. [2020-10-09 11:11:50,128 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 215 transitions. Word has length 31 [2020-10-09 11:11:50,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:50,129 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 215 transitions. [2020-10-09 11:11:50,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:11:50,129 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 215 transitions. [2020-10-09 11:11:50,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:11:50,129 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:50,129 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:50,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2020-10-09 11:11:50,330 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:50,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:50,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 293 times [2020-10-09 11:11:50,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:50,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315229220] [2020-10-09 11:11:50,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:51,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315229220] [2020-10-09 11:11:51,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65692577] [2020-10-09 11:11:51,161 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:51,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-09 11:11:51,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:51,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:11:51,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:51,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:51,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-09 11:11:51,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029968132] [2020-10-09 11:11:51,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:11:51,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:51,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:11:51,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:11:51,260 INFO L87 Difference]: Start difference. First operand 86 states and 215 transitions. Second operand 27 states. [2020-10-09 11:11:53,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:53,315 INFO L93 Difference]: Finished difference Result 155 states and 355 transitions. [2020-10-09 11:11:53,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-09 11:11:53,318 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-09 11:11:53,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:53,319 INFO L225 Difference]: With dead ends: 155 [2020-10-09 11:11:53,319 INFO L226 Difference]: Without dead ends: 149 [2020-10-09 11:11:53,319 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=928, Invalid=2612, Unknown=0, NotChecked=0, Total=3540 [2020-10-09 11:11:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-09 11:11:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 89. [2020-10-09 11:11:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-09 11:11:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2020-10-09 11:11:53,322 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 31 [2020-10-09 11:11:53,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:53,323 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2020-10-09 11:11:53,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:11:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2020-10-09 11:11:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:11:53,323 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:53,323 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:53,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:53,534 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:53,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:53,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1917433145, now seen corresponding path program 294 times [2020-10-09 11:11:53,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:53,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455134047] [2020-10-09 11:11:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:54,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455134047] [2020-10-09 11:11:54,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446861147] [2020-10-09 11:11:54,387 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:54,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-09 11:11:54,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:11:54,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:11:54,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:54,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:11:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:54,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:54,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-09 11:11:54,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263438659] [2020-10-09 11:11:54,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:11:54,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:54,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:11:54,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:11:54,536 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand 28 states. [2020-10-09 11:11:56,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:11:56,845 INFO L93 Difference]: Finished difference Result 152 states and 349 transitions. [2020-10-09 11:11:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-09 11:11:56,846 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-09 11:11:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:11:56,847 INFO L225 Difference]: With dead ends: 152 [2020-10-09 11:11:56,847 INFO L226 Difference]: Without dead ends: 146 [2020-10-09 11:11:56,847 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=932, Invalid=2728, Unknown=0, NotChecked=0, Total=3660 [2020-10-09 11:11:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-09 11:11:56,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2020-10-09 11:11:56,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-09 11:11:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 221 transitions. [2020-10-09 11:11:56,850 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 221 transitions. Word has length 31 [2020-10-09 11:11:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:11:56,850 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 221 transitions. [2020-10-09 11:11:56,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:11:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 221 transitions. [2020-10-09 11:11:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:11:56,850 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:11:56,850 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:11:57,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:57,051 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:11:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:11:57,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 295 times [2020-10-09 11:11:57,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:11:57,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851633894] [2020-10-09 11:11:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:11:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:57,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851633894] [2020-10-09 11:11:57,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836701737] [2020-10-09 11:11:57,886 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:11:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:11:57,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:11:57,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:11:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:11:57,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:11:57,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-09 11:11:57,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91908417] [2020-10-09 11:11:57,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:11:57,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:11:57,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:11:57,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:11:57,973 INFO L87 Difference]: Start difference. First operand 88 states and 221 transitions. Second operand 27 states. [2020-10-09 11:12:00,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:00,178 INFO L93 Difference]: Finished difference Result 153 states and 353 transitions. [2020-10-09 11:12:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-09 11:12:00,181 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-09 11:12:00,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:00,181 INFO L225 Difference]: With dead ends: 153 [2020-10-09 11:12:00,181 INFO L226 Difference]: Without dead ends: 147 [2020-10-09 11:12:00,182 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2020-10-09 11:12:00,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-09 11:12:00,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 91. [2020-10-09 11:12:00,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-09 11:12:00,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 229 transitions. [2020-10-09 11:12:00,188 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 229 transitions. Word has length 31 [2020-10-09 11:12:00,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:00,188 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 229 transitions. [2020-10-09 11:12:00,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:12:00,188 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 229 transitions. [2020-10-09 11:12:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:12:00,189 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:00,189 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:00,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:00,389 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:00,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:00,390 INFO L82 PathProgramCache]: Analyzing trace with hash -449008101, now seen corresponding path program 296 times [2020-10-09 11:12:00,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:00,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682662608] [2020-10-09 11:12:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:01,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682662608] [2020-10-09 11:12:01,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232228178] [2020-10-09 11:12:01,205 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:01,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:12:01,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:12:01,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:12:01,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:01,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:12:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:01,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:01,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-09 11:12:01,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792849187] [2020-10-09 11:12:01,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:12:01,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:01,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:12:01,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:12:01,351 INFO L87 Difference]: Start difference. First operand 91 states and 229 transitions. Second operand 28 states. [2020-10-09 11:12:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:03,826 INFO L93 Difference]: Finished difference Result 150 states and 347 transitions. [2020-10-09 11:12:03,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-09 11:12:03,829 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-09 11:12:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:03,829 INFO L225 Difference]: With dead ends: 150 [2020-10-09 11:12:03,829 INFO L226 Difference]: Without dead ends: 144 [2020-10-09 11:12:03,829 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 11:12:03,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-09 11:12:03,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-10-09 11:12:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-09 11:12:03,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 227 transitions. [2020-10-09 11:12:03,831 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 227 transitions. Word has length 31 [2020-10-09 11:12:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:03,831 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 227 transitions. [2020-10-09 11:12:03,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:12:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 227 transitions. [2020-10-09 11:12:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:12:03,832 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:03,832 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:04,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:04,033 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:04,033 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 297 times [2020-10-09 11:12:04,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:04,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956124246] [2020-10-09 11:12:04,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:04,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956124246] [2020-10-09 11:12:04,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457130577] [2020-10-09 11:12:04,826 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:04,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-09 11:12:04,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:12:04,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:12:04,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:04,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:04,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-09 11:12:04,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518081965] [2020-10-09 11:12:04,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:12:04,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:04,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:12:04,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:12:04,932 INFO L87 Difference]: Start difference. First operand 90 states and 227 transitions. Second operand 27 states. [2020-10-09 11:12:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:07,323 INFO L93 Difference]: Finished difference Result 151 states and 351 transitions. [2020-10-09 11:12:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-09 11:12:07,326 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-09 11:12:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:07,327 INFO L225 Difference]: With dead ends: 151 [2020-10-09 11:12:07,327 INFO L226 Difference]: Without dead ends: 145 [2020-10-09 11:12:07,327 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2020-10-09 11:12:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-09 11:12:07,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2020-10-09 11:12:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-09 11:12:07,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 235 transitions. [2020-10-09 11:12:07,329 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 235 transitions. Word has length 31 [2020-10-09 11:12:07,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:07,329 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 235 transitions. [2020-10-09 11:12:07,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:12:07,330 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 235 transitions. [2020-10-09 11:12:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:12:07,330 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:07,330 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:07,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:07,531 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:07,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:07,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1224505213, now seen corresponding path program 298 times [2020-10-09 11:12:07,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:07,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026918074] [2020-10-09 11:12:07,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:08,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026918074] [2020-10-09 11:12:08,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67245775] [2020-10-09 11:12:08,326 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:08,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:12:08,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:12:08,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:12:08,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:08,446 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:12:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:08,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:08,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-09 11:12:08,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347013986] [2020-10-09 11:12:08,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:12:08,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:08,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:12:08,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:12:08,481 INFO L87 Difference]: Start difference. First operand 93 states and 235 transitions. Second operand 28 states. [2020-10-09 11:12:11,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:11,362 INFO L93 Difference]: Finished difference Result 148 states and 345 transitions. [2020-10-09 11:12:11,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-09 11:12:11,364 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-09 11:12:11,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:11,364 INFO L225 Difference]: With dead ends: 148 [2020-10-09 11:12:11,364 INFO L226 Difference]: Without dead ends: 142 [2020-10-09 11:12:11,365 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1078, Invalid=3082, Unknown=0, NotChecked=0, Total=4160 [2020-10-09 11:12:11,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-09 11:12:11,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 92. [2020-10-09 11:12:11,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 11:12:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 233 transitions. [2020-10-09 11:12:11,367 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 233 transitions. Word has length 31 [2020-10-09 11:12:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:11,367 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 233 transitions. [2020-10-09 11:12:11,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:12:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 233 transitions. [2020-10-09 11:12:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:12:11,368 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:11,368 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:11,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-09 11:12:11,577 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:11,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:11,577 INFO L82 PathProgramCache]: Analyzing trace with hash -392653829, now seen corresponding path program 299 times [2020-10-09 11:12:11,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:11,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468055313] [2020-10-09 11:12:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:12,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468055313] [2020-10-09 11:12:12,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650572758] [2020-10-09 11:12:12,377 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:12,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-09 11:12:12,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:12:12,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:12:12,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:12,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:12,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-09 11:12:12,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026907185] [2020-10-09 11:12:12,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:12:12,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:12,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:12:12,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:12:12,480 INFO L87 Difference]: Start difference. First operand 92 states and 233 transitions. Second operand 27 states. [2020-10-09 11:12:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:15,185 INFO L93 Difference]: Finished difference Result 149 states and 349 transitions. [2020-10-09 11:12:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-09 11:12:15,187 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-09 11:12:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:15,188 INFO L225 Difference]: With dead ends: 149 [2020-10-09 11:12:15,188 INFO L226 Difference]: Without dead ends: 143 [2020-10-09 11:12:15,188 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1168, Invalid=3122, Unknown=0, NotChecked=0, Total=4290 [2020-10-09 11:12:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-09 11:12:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 95. [2020-10-09 11:12:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-09 11:12:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-10-09 11:12:15,190 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 31 [2020-10-09 11:12:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:15,190 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-10-09 11:12:15,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:12:15,190 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-10-09 11:12:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:12:15,191 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:15,191 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:15,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-09 11:12:15,392 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:15,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:15,392 INFO L82 PathProgramCache]: Analyzing trace with hash 864235871, now seen corresponding path program 300 times [2020-10-09 11:12:15,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:15,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791539289] [2020-10-09 11:12:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:16,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791539289] [2020-10-09 11:12:16,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442809778] [2020-10-09 11:12:16,117 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:16,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-09 11:12:16,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:12:16,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:12:16,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:16,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:12:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:16,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:16,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-09 11:12:16,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696944953] [2020-10-09 11:12:16,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:12:16,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:16,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:12:16,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:12:16,280 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 28 states. [2020-10-09 11:12:19,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:19,394 INFO L93 Difference]: Finished difference Result 146 states and 343 transitions. [2020-10-09 11:12:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-09 11:12:19,396 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-09 11:12:19,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:19,397 INFO L225 Difference]: With dead ends: 146 [2020-10-09 11:12:19,397 INFO L226 Difference]: Without dead ends: 140 [2020-10-09 11:12:19,398 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1175, Invalid=3247, Unknown=0, NotChecked=0, Total=4422 [2020-10-09 11:12:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-09 11:12:19,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2020-10-09 11:12:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-09 11:12:19,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-10-09 11:12:19,400 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 31 [2020-10-09 11:12:19,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:19,400 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-10-09 11:12:19,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:12:19,400 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-10-09 11:12:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:12:19,401 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:19,401 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:19,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-09 11:12:19,601 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:19,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:19,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1814538915, now seen corresponding path program 301 times [2020-10-09 11:12:19,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:19,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458123368] [2020-10-09 11:12:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:20,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458123368] [2020-10-09 11:12:20,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97021048] [2020-10-09 11:12:20,271 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:20,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:12:20,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:20,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:20,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-09 11:12:20,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530079580] [2020-10-09 11:12:20,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:12:20,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:20,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:12:20,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:12:20,368 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 27 states. [2020-10-09 11:12:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:23,195 INFO L93 Difference]: Finished difference Result 147 states and 347 transitions. [2020-10-09 11:12:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-09 11:12:23,198 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-09 11:12:23,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:23,199 INFO L225 Difference]: With dead ends: 147 [2020-10-09 11:12:23,199 INFO L226 Difference]: Without dead ends: 141 [2020-10-09 11:12:23,200 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1280, Invalid=3276, Unknown=0, NotChecked=0, Total=4556 [2020-10-09 11:12:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-09 11:12:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2020-10-09 11:12:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-09 11:12:23,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 247 transitions. [2020-10-09 11:12:23,202 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 247 transitions. Word has length 31 [2020-10-09 11:12:23,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:23,202 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 247 transitions. [2020-10-09 11:12:23,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:12:23,203 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 247 transitions. [2020-10-09 11:12:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:12:23,203 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:23,203 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:23,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:23,404 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:23,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:23,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1294795839, now seen corresponding path program 302 times [2020-10-09 11:12:23,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:23,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823079145] [2020-10-09 11:12:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:24,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823079145] [2020-10-09 11:12:24,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888955043] [2020-10-09 11:12:24,133 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:24,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:12:24,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:12:24,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:12:24,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:24,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:12:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:24,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:24,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-09 11:12:24,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074670140] [2020-10-09 11:12:24,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:12:24,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:24,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:12:24,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:12:24,281 INFO L87 Difference]: Start difference. First operand 97 states and 247 transitions. Second operand 28 states. [2020-10-09 11:12:27,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:27,632 INFO L93 Difference]: Finished difference Result 144 states and 341 transitions. [2020-10-09 11:12:27,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-09 11:12:27,635 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-09 11:12:27,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:27,635 INFO L225 Difference]: With dead ends: 144 [2020-10-09 11:12:27,635 INFO L226 Difference]: Without dead ends: 138 [2020-10-09 11:12:27,636 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1288, Invalid=3404, Unknown=0, NotChecked=0, Total=4692 [2020-10-09 11:12:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-09 11:12:27,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2020-10-09 11:12:27,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-09 11:12:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-10-09 11:12:27,638 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 31 [2020-10-09 11:12:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:27,639 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-10-09 11:12:27,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:12:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-10-09 11:12:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:12:27,639 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:27,639 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:27,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-09 11:12:27,847 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:27,847 INFO L82 PathProgramCache]: Analyzing trace with hash 360515391, now seen corresponding path program 303 times [2020-10-09 11:12:27,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:27,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839365245] [2020-10-09 11:12:27,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:28,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839365245] [2020-10-09 11:12:28,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808922606] [2020-10-09 11:12:28,622 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:28,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-09 11:12:28,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:12:28,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:12:28,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:28,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:28,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-09 11:12:28,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405363968] [2020-10-09 11:12:28,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:12:28,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:28,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:12:28,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:12:28,738 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 27 states. [2020-10-09 11:12:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:31,658 INFO L93 Difference]: Finished difference Result 145 states and 345 transitions. [2020-10-09 11:12:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-09 11:12:31,661 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-09 11:12:31,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:31,661 INFO L225 Difference]: With dead ends: 145 [2020-10-09 11:12:31,662 INFO L226 Difference]: Without dead ends: 139 [2020-10-09 11:12:31,662 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1408, Invalid=3422, Unknown=0, NotChecked=0, Total=4830 [2020-10-09 11:12:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-09 11:12:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2020-10-09 11:12:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 11:12:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-09 11:12:31,664 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 31 [2020-10-09 11:12:31,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:31,664 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-09 11:12:31,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:12:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-09 11:12:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:12:31,665 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:31,665 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:31,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:31,866 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:31,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:31,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1359612253, now seen corresponding path program 304 times [2020-10-09 11:12:31,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:31,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310520139] [2020-10-09 11:12:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:32,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310520139] [2020-10-09 11:12:32,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320487673] [2020-10-09 11:12:32,673 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:32,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:12:32,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:12:32,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:12:32,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:32,790 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:12:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:32,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:32,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-09 11:12:32,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98945796] [2020-10-09 11:12:32,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:12:32,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:32,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:12:32,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:12:32,834 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 28 states. [2020-10-09 11:12:36,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:36,329 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2020-10-09 11:12:36,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-09 11:12:36,331 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-09 11:12:36,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:36,331 INFO L225 Difference]: With dead ends: 142 [2020-10-09 11:12:36,332 INFO L226 Difference]: Without dead ends: 136 [2020-10-09 11:12:36,332 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1417, Invalid=3553, Unknown=0, NotChecked=0, Total=4970 [2020-10-09 11:12:36,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-09 11:12:36,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2020-10-09 11:12:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 11:12:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-09 11:12:36,334 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 31 [2020-10-09 11:12:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:36,335 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-09 11:12:36,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:12:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-09 11:12:36,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:12:36,335 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:36,335 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:36,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2020-10-09 11:12:36,536 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:36,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:36,537 INFO L82 PathProgramCache]: Analyzing trace with hash -888616543, now seen corresponding path program 305 times [2020-10-09 11:12:36,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:36,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122312707] [2020-10-09 11:12:36,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:37,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122312707] [2020-10-09 11:12:37,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880217096] [2020-10-09 11:12:37,338 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:37,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-09 11:12:37,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:12:37,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:12:37,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:37,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:37,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-09 11:12:37,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985093101] [2020-10-09 11:12:37,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:12:37,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:37,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:12:37,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:12:37,452 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 27 states. [2020-10-09 11:12:40,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:40,559 INFO L93 Difference]: Finished difference Result 143 states and 343 transitions. [2020-10-09 11:12:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-09 11:12:40,563 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-09 11:12:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:40,563 INFO L225 Difference]: With dead ends: 143 [2020-10-09 11:12:40,563 INFO L226 Difference]: Without dead ends: 137 [2020-10-09 11:12:40,564 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1552, Invalid=3560, Unknown=0, NotChecked=0, Total=5112 [2020-10-09 11:12:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-09 11:12:40,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2020-10-09 11:12:40,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-09 11:12:40,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-10-09 11:12:40,566 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 31 [2020-10-09 11:12:40,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:40,566 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-10-09 11:12:40,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:12:40,566 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-10-09 11:12:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:12:40,567 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:40,567 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:40,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:40,767 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:40,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:40,768 INFO L82 PathProgramCache]: Analyzing trace with hash -872529403, now seen corresponding path program 306 times [2020-10-09 11:12:40,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:40,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541503692] [2020-10-09 11:12:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:41,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541503692] [2020-10-09 11:12:41,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102490023] [2020-10-09 11:12:41,453 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 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:41,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-09 11:12:41,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:12:41,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:12:41,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:41,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:12:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:41,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:41,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-09 11:12:41,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112022277] [2020-10-09 11:12:41,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:12:41,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:41,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:12:41,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:12:41,632 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-10-09 11:12:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:45,375 INFO L93 Difference]: Finished difference Result 140 states and 337 transitions. [2020-10-09 11:12:45,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-09 11:12:45,378 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-09 11:12:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:45,378 INFO L225 Difference]: With dead ends: 140 [2020-10-09 11:12:45,378 INFO L226 Difference]: Without dead ends: 134 [2020-10-09 11:12:45,379 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1562, Invalid=3694, Unknown=0, NotChecked=0, Total=5256 [2020-10-09 11:12:45,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-09 11:12:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 100. [2020-10-09 11:12:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-09 11:12:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-10-09 11:12:45,382 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 31 [2020-10-09 11:12:45,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:45,382 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-10-09 11:12:45,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:12:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-10-09 11:12:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:12:45,382 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:45,382 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:45,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:45,583 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:45,584 INFO L82 PathProgramCache]: Analyzing trace with hash -872039293, now seen corresponding path program 307 times [2020-10-09 11:12:45,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:45,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180674003] [2020-10-09 11:12:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:46,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180674003] [2020-10-09 11:12:46,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517382628] [2020-10-09 11:12:46,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:46,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 11:12:46,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:46,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:46,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-09 11:12:46,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696072886] [2020-10-09 11:12:46,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 11:12:46,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:46,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 11:12:46,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-10-09 11:12:46,498 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 27 states. [2020-10-09 11:12:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:49,701 INFO L93 Difference]: Finished difference Result 160 states and 387 transitions. [2020-10-09 11:12:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-09 11:12:49,704 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-09 11:12:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:49,705 INFO L225 Difference]: With dead ends: 160 [2020-10-09 11:12:49,705 INFO L226 Difference]: Without dead ends: 154 [2020-10-09 11:12:49,706 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1712, Invalid=3690, Unknown=0, NotChecked=0, Total=5402 [2020-10-09 11:12:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-09 11:12:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2020-10-09 11:12:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-09 11:12:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 277 transitions. [2020-10-09 11:12:49,713 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 277 transitions. Word has length 31 [2020-10-09 11:12:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:49,713 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 277 transitions. [2020-10-09 11:12:49,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 11:12:49,713 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 277 transitions. [2020-10-09 11:12:49,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-09 11:12:49,714 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:49,714 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:49,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2020-10-09 11:12:49,914 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:49,915 INFO L82 PathProgramCache]: Analyzing trace with hash -872022553, now seen corresponding path program 308 times [2020-10-09 11:12:49,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:49,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69064729] [2020-10-09 11:12:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:50,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69064729] [2020-10-09 11:12:50,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432533186] [2020-10-09 11:12:50,723 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:50,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:12:50,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:12:50,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:12:50,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:50,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:50,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-09 11:12:50,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197793057] [2020-10-09 11:12:50,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:12:50,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:50,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:12:50,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:12:50,907 INFO L87 Difference]: Start difference. First operand 106 states and 277 transitions. Second operand 28 states. [2020-10-09 11:12:54,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:54,620 INFO L93 Difference]: Finished difference Result 141 states and 343 transitions. [2020-10-09 11:12:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-09 11:12:54,622 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-09 11:12:54,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:54,622 INFO L225 Difference]: With dead ends: 141 [2020-10-09 11:12:54,622 INFO L226 Difference]: Without dead ends: 133 [2020-10-09 11:12:54,623 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1555, Invalid=3995, Unknown=0, NotChecked=0, Total=5550 [2020-10-09 11:12:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-09 11:12:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2020-10-09 11:12:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-09 11:12:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-10-09 11:12:54,625 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-10-09 11:12:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:54,625 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-10-09 11:12:54,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:12:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-10-09 11:12:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:12:54,626 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:54,626 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:54,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:54,827 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:54,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:54,827 INFO L82 PathProgramCache]: Analyzing trace with hash 470887608, now seen corresponding path program 309 times [2020-10-09 11:12:54,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:54,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341429812] [2020-10-09 11:12:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:55,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341429812] [2020-10-09 11:12:55,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778438323] [2020-10-09 11:12:55,895 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:55,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-09 11:12:55,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:12:55,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:12:55,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:55,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:55,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-09 11:12:55,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255968071] [2020-10-09 11:12:55,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:12:55,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:55,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:12:55,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:12:55,984 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-10-09 11:12:57,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:12:57,738 INFO L93 Difference]: Finished difference Result 164 states and 387 transitions. [2020-10-09 11:12:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 11:12:57,741 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-09 11:12:57,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:12:57,741 INFO L225 Difference]: With dead ends: 164 [2020-10-09 11:12:57,742 INFO L226 Difference]: Without dead ends: 158 [2020-10-09 11:12:57,742 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=841, Invalid=1915, Unknown=0, NotChecked=0, Total=2756 [2020-10-09 11:12:57,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-09 11:12:57,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 105. [2020-10-09 11:12:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 11:12:57,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-09 11:12:57,745 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-09 11:12:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:12:57,745 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-09 11:12:57,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:12:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-09 11:12:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:12:57,745 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:12:57,745 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:12:57,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-09 11:12:57,946 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:12:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:12:57,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1353020644, now seen corresponding path program 310 times [2020-10-09 11:12:57,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:12:57,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661590383] [2020-10-09 11:12:57,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:12:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:12:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:58,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661590383] [2020-10-09 11:12:58,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82268201] [2020-10-09 11:12:58,977 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:12:59,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:12:59,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:12:59,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:12:59,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:12:59,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:12:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:12:59,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:12:59,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-09 11:12:59,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191689288] [2020-10-09 11:12:59,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:12:59,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:12:59,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:12:59,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:12:59,126 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-09 11:13:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:01,307 INFO L93 Difference]: Finished difference Result 161 states and 381 transitions. [2020-10-09 11:13:01,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 11:13:01,309 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-09 11:13:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:01,310 INFO L225 Difference]: With dead ends: 161 [2020-10-09 11:13:01,310 INFO L226 Difference]: Without dead ends: 155 [2020-10-09 11:13:01,310 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=897, Invalid=2183, Unknown=0, NotChecked=0, Total=3080 [2020-10-09 11:13:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-09 11:13:01,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 104. [2020-10-09 11:13:01,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 11:13:01,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-09 11:13:01,313 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-09 11:13:01,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:01,313 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-09 11:13:01,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:13:01,313 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-09 11:13:01,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:01,313 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:01,314 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:01,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-09 11:13:01,514 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:01,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:01,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2116672154, now seen corresponding path program 311 times [2020-10-09 11:13:01,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:01,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059205367] [2020-10-09 11:13:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:02,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059205367] [2020-10-09 11:13:02,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605811415] [2020-10-09 11:13:02,488 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:02,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-09 11:13:02,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:13:02,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:13:02,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:13:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:02,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:13:02,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-09 11:13:02,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777179666] [2020-10-09 11:13:02,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:13:02,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:13:02,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:13:02,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:13:02,578 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-09 11:13:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:04,551 INFO L93 Difference]: Finished difference Result 158 states and 375 transitions. [2020-10-09 11:13:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:13:04,553 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-09 11:13:04,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:04,554 INFO L225 Difference]: With dead ends: 158 [2020-10-09 11:13:04,554 INFO L226 Difference]: Without dead ends: 152 [2020-10-09 11:13:04,555 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=842, Invalid=2128, Unknown=0, NotChecked=0, Total=2970 [2020-10-09 11:13:04,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-09 11:13:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 105. [2020-10-09 11:13:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 11:13:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-09 11:13:04,561 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-09 11:13:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:04,561 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-09 11:13:04,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:13:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-09 11:13:04,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:04,562 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:04,562 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:04,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-09 11:13:04,763 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:04,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:04,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1077903870, now seen corresponding path program 312 times [2020-10-09 11:13:04,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:04,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352535687] [2020-10-09 11:13:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:05,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352535687] [2020-10-09 11:13:05,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30415265] [2020-10-09 11:13:05,889 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:05,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-09 11:13:05,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:13:05,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:13:05,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:13:06,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:13:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:06,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:13:06,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-09 11:13:06,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738957442] [2020-10-09 11:13:06,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:13:06,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:13:06,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:13:06,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:13:06,080 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-09 11:13:08,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:08,379 INFO L93 Difference]: Finished difference Result 157 states and 373 transitions. [2020-10-09 11:13:08,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 11:13:08,382 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-09 11:13:08,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:08,383 INFO L225 Difference]: With dead ends: 157 [2020-10-09 11:13:08,383 INFO L226 Difference]: Without dead ends: 151 [2020-10-09 11:13:08,383 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2020-10-09 11:13:08,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-09 11:13:08,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 104. [2020-10-09 11:13:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 11:13:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-09 11:13:08,386 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-09 11:13:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:08,386 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-09 11:13:08,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:13:08,386 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-09 11:13:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:08,387 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:08,387 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:08,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-09 11:13:08,587 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:08,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1492687100, now seen corresponding path program 313 times [2020-10-09 11:13:08,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:08,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612502454] [2020-10-09 11:13:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:09,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612502454] [2020-10-09 11:13:09,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788122238] [2020-10-09 11:13:09,670 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 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:09,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:13:09,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:13:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:09,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:13:09,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-09 11:13:09,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221626822] [2020-10-09 11:13:09,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:13:09,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:13:09,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:13:09,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:13:09,753 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-09 11:13:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:11,805 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-10-09 11:13:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-09 11:13:11,808 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-09 11:13:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:11,809 INFO L225 Difference]: With dead ends: 154 [2020-10-09 11:13:11,809 INFO L226 Difference]: Without dead ends: 148 [2020-10-09 11:13:11,809 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=859, Invalid=2333, Unknown=0, NotChecked=0, Total=3192 [2020-10-09 11:13:11,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-09 11:13:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2020-10-09 11:13:11,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 11:13:11,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-09 11:13:11,812 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-09 11:13:11,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:11,812 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-09 11:13:11,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:13:11,812 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-09 11:13:11,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:11,813 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:11,813 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:12,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:12,022 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:12,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:12,022 INFO L82 PathProgramCache]: Analyzing trace with hash -229062304, now seen corresponding path program 314 times [2020-10-09 11:13:12,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:12,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641496851] [2020-10-09 11:13:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:13,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641496851] [2020-10-09 11:13:13,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042824395] [2020-10-09 11:13:13,110 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 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:13,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:13:13,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:13:13,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:13:13,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:13:13,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:13:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:13,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:13:13,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-09 11:13:13,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797926820] [2020-10-09 11:13:13,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:13:13,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:13:13,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:13:13,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:13:13,268 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-09 11:13:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:15,776 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-10-09 11:13:15,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 11:13:15,779 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-09 11:13:15,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:15,780 INFO L225 Difference]: With dead ends: 153 [2020-10-09 11:13:15,780 INFO L226 Difference]: Without dead ends: 147 [2020-10-09 11:13:15,781 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2020-10-09 11:13:15,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-09 11:13:15,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2020-10-09 11:13:15,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 11:13:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-09 11:13:15,783 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-09 11:13:15,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:15,783 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-09 11:13:15,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:13:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-09 11:13:15,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:15,784 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:15,784 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:15,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-09 11:13:15,985 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:15,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:15,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1412986914, now seen corresponding path program 315 times [2020-10-09 11:13:15,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:15,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142133798] [2020-10-09 11:13:15,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:17,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142133798] [2020-10-09 11:13:17,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103971582] [2020-10-09 11:13:17,033 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 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:17,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-09 11:13:17,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:13:17,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:13:17,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:13:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:17,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:13:17,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-09 11:13:17,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171904913] [2020-10-09 11:13:17,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:13:17,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:13:17,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:13:17,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:13:17,130 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-09 11:13:19,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:19,423 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-10-09 11:13:19,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 11:13:19,427 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-09 11:13:19,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:19,427 INFO L225 Difference]: With dead ends: 150 [2020-10-09 11:13:19,427 INFO L226 Difference]: Without dead ends: 144 [2020-10-09 11:13:19,428 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-10-09 11:13:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-09 11:13:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 105. [2020-10-09 11:13:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 11:13:19,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-09 11:13:19,431 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-09 11:13:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:19,431 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-09 11:13:19,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:13:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-09 11:13:19,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:19,431 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:19,431 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:19,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-09 11:13:19,632 INFO L429 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:19,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:19,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1333821762, now seen corresponding path program 316 times [2020-10-09 11:13:19,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:19,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941384890] [2020-10-09 11:13:19,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:20,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941384890] [2020-10-09 11:13:20,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622168125] [2020-10-09 11:13:20,682 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 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:20,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:13:20,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:13:20,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:13:20,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:13:20,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:13:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:20,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:13:20,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-09 11:13:20,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595834628] [2020-10-09 11:13:20,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:13:20,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:13:20,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:13:20,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:13:20,840 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-09 11:13:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:23,637 INFO L93 Difference]: Finished difference Result 149 states and 357 transitions. [2020-10-09 11:13:23,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-09 11:13:23,640 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-09 11:13:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:23,640 INFO L225 Difference]: With dead ends: 149 [2020-10-09 11:13:23,640 INFO L226 Difference]: Without dead ends: 143 [2020-10-09 11:13:23,641 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=969, Invalid=2813, Unknown=0, NotChecked=0, Total=3782 [2020-10-09 11:13:23,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-09 11:13:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2020-10-09 11:13:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 11:13:23,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-09 11:13:23,644 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-09 11:13:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:23,644 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-09 11:13:23,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:13:23,644 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-09 11:13:23,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:23,644 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:23,644 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:23,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2020-10-09 11:13:23,845 INFO L429 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:23,846 INFO L82 PathProgramCache]: Analyzing trace with hash 32032576, now seen corresponding path program 317 times [2020-10-09 11:13:23,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:23,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429912123] [2020-10-09 11:13:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:24,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429912123] [2020-10-09 11:13:24,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127204912] [2020-10-09 11:13:24,839 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 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:24,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-09 11:13:24,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:13:24,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:13:24,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:13:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:24,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:13:24,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-09 11:13:24,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796723175] [2020-10-09 11:13:24,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:13:24,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:13:24,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:13:24,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:13:24,941 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-09 11:13:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:27,445 INFO L93 Difference]: Finished difference Result 146 states and 351 transitions. [2020-10-09 11:13:27,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-09 11:13:27,448 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-09 11:13:27,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:27,448 INFO L225 Difference]: With dead ends: 146 [2020-10-09 11:13:27,448 INFO L226 Difference]: Without dead ends: 140 [2020-10-09 11:13:27,448 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=941, Invalid=2719, Unknown=0, NotChecked=0, Total=3660 [2020-10-09 11:13:27,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-09 11:13:27,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2020-10-09 11:13:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 11:13:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-09 11:13:27,451 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-09 11:13:27,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:27,451 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-09 11:13:27,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:13:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-09 11:13:27,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:27,452 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:27,452 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:27,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:27,653 INFO L429 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:27,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:27,653 INFO L82 PathProgramCache]: Analyzing trace with hash -778516060, now seen corresponding path program 318 times [2020-10-09 11:13:27,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:27,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938695913] [2020-10-09 11:13:27,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:28,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938695913] [2020-10-09 11:13:28,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883843469] [2020-10-09 11:13:28,672 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 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:28,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-09 11:13:28,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:13:28,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:13:28,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:13:28,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:13:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:28,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:13:28,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-09 11:13:28,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548495715] [2020-10-09 11:13:28,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:13:28,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:13:28,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:13:28,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:13:28,851 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-09 11:13:31,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:31,999 INFO L93 Difference]: Finished difference Result 145 states and 349 transitions. [2020-10-09 11:13:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-09 11:13:32,001 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-09 11:13:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:32,001 INFO L225 Difference]: With dead ends: 145 [2020-10-09 11:13:32,002 INFO L226 Difference]: Without dead ends: 139 [2020-10-09 11:13:32,002 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-10-09 11:13:32,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-09 11:13:32,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 104. [2020-10-09 11:13:32,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 11:13:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-09 11:13:32,004 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-09 11:13:32,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:32,004 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-09 11:13:32,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:13:32,005 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-09 11:13:32,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:32,005 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:32,005 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:32,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:32,206 INFO L429 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:32,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:32,206 INFO L82 PathProgramCache]: Analyzing trace with hash -726239454, now seen corresponding path program 319 times [2020-10-09 11:13:32,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:32,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150651955] [2020-10-09 11:13:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:33,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150651955] [2020-10-09 11:13:33,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451852048] [2020-10-09 11:13:33,186 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 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:33,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:13:33,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:13:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:33,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:13:33,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-09 11:13:33,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668874657] [2020-10-09 11:13:33,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:13:33,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:13:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:13:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:13:33,290 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-09 11:13:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:36,173 INFO L93 Difference]: Finished difference Result 142 states and 343 transitions. [2020-10-09 11:13:36,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-09 11:13:36,176 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-09 11:13:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:36,177 INFO L225 Difference]: With dead ends: 142 [2020-10-09 11:13:36,177 INFO L226 Difference]: Without dead ends: 136 [2020-10-09 11:13:36,177 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 11:13:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-09 11:13:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2020-10-09 11:13:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 11:13:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-09 11:13:36,180 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-09 11:13:36,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:36,180 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-09 11:13:36,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:13:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-09 11:13:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:36,181 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:36,181 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:36,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2020-10-09 11:13:36,382 INFO L429 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:36,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:36,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1150009990, now seen corresponding path program 320 times [2020-10-09 11:13:36,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:36,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003055137] [2020-10-09 11:13:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:37,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003055137] [2020-10-09 11:13:37,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535723978] [2020-10-09 11:13:37,308 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 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:37,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:13:37,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:13:37,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:13:37,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:13:37,436 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:13:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:37,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:13:37,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-09 11:13:37,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103320791] [2020-10-09 11:13:37,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:13:37,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:13:37,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:13:37,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:13:37,475 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-09 11:13:40,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:40,857 INFO L93 Difference]: Finished difference Result 141 states and 341 transitions. [2020-10-09 11:13:40,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-09 11:13:40,860 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-09 11:13:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:40,861 INFO L225 Difference]: With dead ends: 141 [2020-10-09 11:13:40,861 INFO L226 Difference]: Without dead ends: 135 [2020-10-09 11:13:40,862 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1097, Invalid=3193, Unknown=0, NotChecked=0, Total=4290 [2020-10-09 11:13:40,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-09 11:13:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2020-10-09 11:13:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 11:13:40,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-09 11:13:40,864 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-09 11:13:40,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:40,864 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-09 11:13:40,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:13:40,864 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-09 11:13:40,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:40,865 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:40,865 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:41,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2020-10-09 11:13:41,066 INFO L429 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:41,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:41,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1838331780, now seen corresponding path program 321 times [2020-10-09 11:13:41,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:41,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992255231] [2020-10-09 11:13:41,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:41,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992255231] [2020-10-09 11:13:41,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743479242] [2020-10-09 11:13:41,919 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 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:41,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-09 11:13:41,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:13:41,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:13:41,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:13:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:42,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:13:42,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-09 11:13:42,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944297901] [2020-10-09 11:13:42,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:13:42,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:13:42,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:13:42,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:13:42,028 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-09 11:13:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:45,086 INFO L93 Difference]: Finished difference Result 138 states and 335 transitions. [2020-10-09 11:13:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-09 11:13:45,089 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-09 11:13:45,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:45,090 INFO L225 Difference]: With dead ends: 138 [2020-10-09 11:13:45,090 INFO L226 Difference]: Without dead ends: 132 [2020-10-09 11:13:45,090 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1087, Invalid=3073, Unknown=0, NotChecked=0, Total=4160 [2020-10-09 11:13:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-09 11:13:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 105. [2020-10-09 11:13:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 11:13:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-09 11:13:45,093 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-09 11:13:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:45,093 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-09 11:13:45,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:13:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-09 11:13:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:45,093 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:45,093 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:45,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2020-10-09 11:13:45,294 INFO L429 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:45,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:45,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1471443992, now seen corresponding path program 322 times [2020-10-09 11:13:45,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:45,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608419641] [2020-10-09 11:13:45,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:46,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608419641] [2020-10-09 11:13:46,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542675816] [2020-10-09 11:13:46,149 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 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:46,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:13:46,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:13:46,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:13:46,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:13:46,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:13:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:46,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:13:46,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-09 11:13:46,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109051941] [2020-10-09 11:13:46,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:13:46,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:13:46,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:13:46,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:13:46,322 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-09 11:13:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:50,018 INFO L93 Difference]: Finished difference Result 137 states and 333 transitions. [2020-10-09 11:13:50,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-09 11:13:50,020 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-09 11:13:50,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:50,021 INFO L225 Difference]: With dead ends: 137 [2020-10-09 11:13:50,021 INFO L226 Difference]: Without dead ends: 131 [2020-10-09 11:13:50,022 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1185, Invalid=3371, Unknown=0, NotChecked=0, Total=4556 [2020-10-09 11:13:50,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-09 11:13:50,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 104. [2020-10-09 11:13:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 11:13:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-09 11:13:50,024 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-09 11:13:50,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:50,024 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-09 11:13:50,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:13:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-09 11:13:50,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:50,025 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:50,025 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:50,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2020-10-09 11:13:50,226 INFO L429 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:50,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:50,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1206364262, now seen corresponding path program 323 times [2020-10-09 11:13:50,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:50,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294932840] [2020-10-09 11:13:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:51,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294932840] [2020-10-09 11:13:51,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626608727] [2020-10-09 11:13:51,186 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 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:51,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-09 11:13:51,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:13:51,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:13:51,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:13:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:51,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:13:51,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-09 11:13:51,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158267334] [2020-10-09 11:13:51,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:13:51,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:13:51,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:13:51,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:13:51,291 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-09 11:13:54,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:54,487 INFO L93 Difference]: Finished difference Result 134 states and 327 transitions. [2020-10-09 11:13:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-09 11:13:54,490 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-09 11:13:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:54,491 INFO L225 Difference]: With dead ends: 134 [2020-10-09 11:13:54,491 INFO L226 Difference]: Without dead ends: 128 [2020-10-09 11:13:54,491 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1184, Invalid=3238, Unknown=0, NotChecked=0, Total=4422 [2020-10-09 11:13:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-09 11:13:54,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2020-10-09 11:13:54,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 11:13:54,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-09 11:13:54,494 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-09 11:13:54,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:54,494 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-09 11:13:54,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:13:54,494 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-09 11:13:54,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:54,494 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:54,494 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:54,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:54,695 INFO L429 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:54,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:54,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1831713334, now seen corresponding path program 324 times [2020-10-09 11:13:54,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:54,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103022925] [2020-10-09 11:13:54,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:13:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:55,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103022925] [2020-10-09 11:13:55,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924576969] [2020-10-09 11:13:55,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:13:55,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-09 11:13:55,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:13:55,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:13:55,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:13:55,827 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:13:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:13:55,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:13:55,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-09 11:13:55,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874444090] [2020-10-09 11:13:55,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:13:55,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:13:55,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:13:55,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:13:55,870 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-09 11:13:59,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:13:59,718 INFO L93 Difference]: Finished difference Result 133 states and 325 transitions. [2020-10-09 11:13:59,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-09 11:13:59,720 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-09 11:13:59,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:13:59,721 INFO L225 Difference]: With dead ends: 133 [2020-10-09 11:13:59,721 INFO L226 Difference]: Without dead ends: 127 [2020-10-09 11:13:59,721 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1289, Invalid=3541, Unknown=0, NotChecked=0, Total=4830 [2020-10-09 11:13:59,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-09 11:13:59,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2020-10-09 11:13:59,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 11:13:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-09 11:13:59,724 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-09 11:13:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:13:59,724 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-09 11:13:59,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:13:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-09 11:13:59,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:13:59,724 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:13:59,724 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:13:59,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2020-10-09 11:13:59,925 INFO L429 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:13:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:13:59,926 INFO L82 PathProgramCache]: Analyzing trace with hash -215520824, now seen corresponding path program 325 times [2020-10-09 11:13:59,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:13:59,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982216213] [2020-10-09 11:13:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:13:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:14:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:00,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982216213] [2020-10-09 11:14:00,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883686660] [2020-10-09 11:14:00,896 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 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:14:00,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:14:00,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:14:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:01,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:14:01,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-09 11:14:01,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983555518] [2020-10-09 11:14:01,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:14:01,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:14:01,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:14:01,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:14:01,022 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-09 11:14:04,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:14:04,349 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-10-09 11:14:04,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-09 11:14:04,353 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-09 11:14:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:14:04,354 INFO L225 Difference]: With dead ends: 130 [2020-10-09 11:14:04,354 INFO L226 Difference]: Without dead ends: 124 [2020-10-09 11:14:04,355 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1297, Invalid=3395, Unknown=0, NotChecked=0, Total=4692 [2020-10-09 11:14:04,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-09 11:14:04,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2020-10-09 11:14:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 11:14:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-09 11:14:04,357 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-09 11:14:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:14:04,358 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-09 11:14:04,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:14:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-09 11:14:04,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:14:04,358 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:14:04,358 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:14:04,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:04,559 INFO L429 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:14:04,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:14:04,559 INFO L82 PathProgramCache]: Analyzing trace with hash 304222252, now seen corresponding path program 326 times [2020-10-09 11:14:04,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:14:04,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880026479] [2020-10-09 11:14:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:14:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:14:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:05,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880026479] [2020-10-09 11:14:05,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132709806] [2020-10-09 11:14:05,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:05,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:14:05,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:14:05,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:14:05,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:14:05,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:14:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:05,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:14:05,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-09 11:14:05,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740211264] [2020-10-09 11:14:05,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:14:05,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:14:05,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:14:05,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:14:05,717 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-09 11:14:09,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:14:09,911 INFO L93 Difference]: Finished difference Result 129 states and 317 transitions. [2020-10-09 11:14:09,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-09 11:14:09,914 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-09 11:14:09,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:14:09,914 INFO L225 Difference]: With dead ends: 129 [2020-10-09 11:14:09,915 INFO L226 Difference]: Without dead ends: 123 [2020-10-09 11:14:09,915 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1409, Invalid=3703, Unknown=0, NotChecked=0, Total=5112 [2020-10-09 11:14:09,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-09 11:14:09,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2020-10-09 11:14:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 11:14:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-09 11:14:09,917 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-09 11:14:09,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:14:09,917 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-09 11:14:09,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:14:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-09 11:14:09,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:14:09,918 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:14:09,918 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:14:10,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2020-10-09 11:14:10,119 INFO L429 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:14:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:14:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1959533482, now seen corresponding path program 327 times [2020-10-09 11:14:10,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:14:10,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843713309] [2020-10-09 11:14:10,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:14:10,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:14:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:11,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843713309] [2020-10-09 11:14:11,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363555459] [2020-10-09 11:14:11,068 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 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:11,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-09 11:14:11,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:14:11,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:14:11,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:14:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:11,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:14:11,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-09 11:14:11,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367086067] [2020-10-09 11:14:11,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:14:11,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:14:11,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:14:11,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:14:11,200 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-09 11:14:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:14:14,788 INFO L93 Difference]: Finished difference Result 126 states and 311 transitions. [2020-10-09 11:14:14,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-09 11:14:14,790 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-09 11:14:14,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:14:14,791 INFO L225 Difference]: With dead ends: 126 [2020-10-09 11:14:14,791 INFO L226 Difference]: Without dead ends: 120 [2020-10-09 11:14:14,792 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1426, Invalid=3544, Unknown=0, NotChecked=0, Total=4970 [2020-10-09 11:14:14,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-09 11:14:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2020-10-09 11:14:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 11:14:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-09 11:14:14,794 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-09 11:14:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:14:14,794 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-09 11:14:14,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:14:14,794 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-09 11:14:14,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:14:14,794 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:14:14,794 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:14:14,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:14,995 INFO L429 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:14:14,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:14:14,996 INFO L82 PathProgramCache]: Analyzing trace with hash 239405838, now seen corresponding path program 328 times [2020-10-09 11:14:14,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:14:14,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716608912] [2020-10-09 11:14:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:14:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:14:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:15,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716608912] [2020-10-09 11:14:15,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510020290] [2020-10-09 11:14:15,983 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 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:16,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:14:16,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:14:16,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:14:16,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:14:16,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:14:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:16,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:14:16,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-09 11:14:16,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158283734] [2020-10-09 11:14:16,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:14:16,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:14:16,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:14:16,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:14:16,168 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-09 11:14:20,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:14:20,595 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-09 11:14:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-09 11:14:20,597 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-09 11:14:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:14:20,597 INFO L225 Difference]: With dead ends: 125 [2020-10-09 11:14:20,598 INFO L226 Difference]: Without dead ends: 119 [2020-10-09 11:14:20,598 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1545, Invalid=3857, Unknown=0, NotChecked=0, Total=5402 [2020-10-09 11:14:20,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-09 11:14:20,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2020-10-09 11:14:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 11:14:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-09 11:14:20,600 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-09 11:14:20,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:14:20,600 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-09 11:14:20,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:14:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-09 11:14:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:14:20,601 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:14:20,601 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:14:20,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2020-10-09 11:14:20,801 INFO L429 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:14:20,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:14:20,802 INFO L82 PathProgramCache]: Analyzing trace with hash 710401548, now seen corresponding path program 329 times [2020-10-09 11:14:20,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:14:20,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689518479] [2020-10-09 11:14:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:14:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:14:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:21,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689518479] [2020-10-09 11:14:21,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858556816] [2020-10-09 11:14:21,759 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 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:21,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-09 11:14:21,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:14:21,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:14:21,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:14:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:21,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:14:21,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-09 11:14:21,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203993016] [2020-10-09 11:14:21,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:14:21,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:14:21,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:14:21,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:14:21,886 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-09 11:14:25,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:14:25,709 INFO L93 Difference]: Finished difference Result 122 states and 303 transitions. [2020-10-09 11:14:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-09 11:14:25,711 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-09 11:14:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:14:25,711 INFO L225 Difference]: With dead ends: 122 [2020-10-09 11:14:25,711 INFO L226 Difference]: Without dead ends: 116 [2020-10-09 11:14:25,712 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2020-10-09 11:14:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-09 11:14:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2020-10-09 11:14:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 11:14:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-09 11:14:25,714 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-09 11:14:25,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:14:25,714 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-09 11:14:25,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:14:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-09 11:14:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:14:25,715 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:14:25,715 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:14:25,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:25,916 INFO L429 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:14:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:14:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash 726488688, now seen corresponding path program 330 times [2020-10-09 11:14:25,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:14:25,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820777134] [2020-10-09 11:14:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:14:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:14:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:26,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820777134] [2020-10-09 11:14:26,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841837401] [2020-10-09 11:14:26,889 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 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:26,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-09 11:14:26,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:14:26,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:14:26,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:14:27,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:14:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:27,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:14:27,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-09 11:14:27,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697192280] [2020-10-09 11:14:27,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:14:27,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:14:27,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:14:27,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:14:27,080 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-09 11:14:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:14:31,727 INFO L93 Difference]: Finished difference Result 121 states and 301 transitions. [2020-10-09 11:14:31,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-09 11:14:31,731 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-09 11:14:31,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:14:31,731 INFO L225 Difference]: With dead ends: 121 [2020-10-09 11:14:31,731 INFO L226 Difference]: Without dead ends: 115 [2020-10-09 11:14:31,732 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1697, Invalid=4003, Unknown=0, NotChecked=0, Total=5700 [2020-10-09 11:14:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-09 11:14:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-10-09 11:14:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 11:14:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-09 11:14:31,734 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-09 11:14:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:14:31,735 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-09 11:14:31,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:14:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-09 11:14:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:14:31,735 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:14:31,735 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:14:31,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:31,936 INFO L429 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:14:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:14:31,937 INFO L82 PathProgramCache]: Analyzing trace with hash 726978798, now seen corresponding path program 331 times [2020-10-09 11:14:31,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:14:31,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395386381] [2020-10-09 11:14:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:14:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:14:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:32,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395386381] [2020-10-09 11:14:32,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561476609] [2020-10-09 11:14:32,910 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 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:14:32,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:14:32,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:14:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:33,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:14:33,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-09 11:14:33,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350759161] [2020-10-09 11:14:33,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-09 11:14:33,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:14:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-09 11:14:33,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-09 11:14:33,035 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-09 11:14:37,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:14:37,056 INFO L93 Difference]: Finished difference Result 137 states and 341 transitions. [2020-10-09 11:14:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-09 11:14:37,059 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-09 11:14:37,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:14:37,060 INFO L225 Difference]: With dead ends: 137 [2020-10-09 11:14:37,060 INFO L226 Difference]: Without dead ends: 131 [2020-10-09 11:14:37,061 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1732, Invalid=3818, Unknown=0, NotChecked=0, Total=5550 [2020-10-09 11:14:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-09 11:14:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2020-10-09 11:14:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-09 11:14:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 281 transitions. [2020-10-09 11:14:37,063 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 281 transitions. Word has length 32 [2020-10-09 11:14:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:14:37,064 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 281 transitions. [2020-10-09 11:14:37,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-09 11:14:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 281 transitions. [2020-10-09 11:14:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:14:37,064 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:14:37,064 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:14:37,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2020-10-09 11:14:37,265 INFO L429 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:14:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:14:37,266 INFO L82 PathProgramCache]: Analyzing trace with hash 726995538, now seen corresponding path program 332 times [2020-10-09 11:14:37,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:14:37,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934870314] [2020-10-09 11:14:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:14:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:14:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:38,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934870314] [2020-10-09 11:14:38,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727024025] [2020-10-09 11:14:38,250 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 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:38,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:14:38,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:14:38,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:14:38,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:14:38,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:14:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:38,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:14:38,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-09 11:14:38,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513630276] [2020-10-09 11:14:38,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:14:38,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:14:38,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:14:38,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:14:38,441 INFO L87 Difference]: Start difference. First operand 108 states and 281 transitions. Second operand 29 states. [2020-10-09 11:14:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:14:43,205 INFO L93 Difference]: Finished difference Result 118 states and 297 transitions. [2020-10-09 11:14:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-09 11:14:43,208 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-09 11:14:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:14:43,209 INFO L225 Difference]: With dead ends: 118 [2020-10-09 11:14:43,209 INFO L226 Difference]: Without dead ends: 110 [2020-10-09 11:14:43,209 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1865, Invalid=4141, Unknown=0, NotChecked=0, Total=6006 [2020-10-09 11:14:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-09 11:14:43,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2020-10-09 11:14:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-09 11:14:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 188 transitions. [2020-10-09 11:14:43,212 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 188 transitions. Word has length 32 [2020-10-09 11:14:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:14:43,212 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 188 transitions. [2020-10-09 11:14:43,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:14:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 188 transitions. [2020-10-09 11:14:43,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-09 11:14:43,212 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:14:43,212 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:14:43,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2020-10-09 11:14:43,413 INFO L429 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:14:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:14:43,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1262879060, now seen corresponding path program 333 times [2020-10-09 11:14:43,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:14:43,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596964447] [2020-10-09 11:14:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:14:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:14:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:44,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596964447] [2020-10-09 11:14:44,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612707684] [2020-10-09 11:14:44,378 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 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:44,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-09 11:14:44,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:14:44,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-09 11:14:44,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:14:44,487 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:14:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:44,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:14:44,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-09 11:14:44,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790124638] [2020-10-09 11:14:44,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:14:44,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:14:44,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:14:44,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:14:44,550 INFO L87 Difference]: Start difference. First operand 77 states and 188 transitions. Second operand 29 states. [2020-10-09 11:14:49,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:14:49,068 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-10-09 11:14:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-09 11:14:49,072 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-09 11:14:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:14:49,072 INFO L225 Difference]: With dead ends: 140 [2020-10-09 11:14:49,072 INFO L226 Difference]: Without dead ends: 135 [2020-10-09 11:14:49,073 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-10-09 11:14:49,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-09 11:14:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2020-10-09 11:14:49,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-09 11:14:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-10-09 11:14:49,075 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 32 [2020-10-09 11:14:49,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:14:49,076 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-10-09 11:14:49,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:14:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-10-09 11:14:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:14:49,076 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:14:49,076 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:14:49,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2020-10-09 11:14:49,277 INFO L429 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:14:49,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:14:49,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1062041505, now seen corresponding path program 334 times [2020-10-09 11:14:49,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:14:49,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626447265] [2020-10-09 11:14:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:14:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:14:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:50,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626447265] [2020-10-09 11:14:50,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255081210] [2020-10-09 11:14:50,346 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 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:50,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:14:50,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:14:50,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:14:50,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:14:50,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 11:14:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:50,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:14:50,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-09 11:14:50,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551470851] [2020-10-09 11:14:50,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:14:50,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:14:50,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:14:50,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:14:50,565 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 30 states. [2020-10-09 11:14:55,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:14:55,422 INFO L93 Difference]: Finished difference Result 114 states and 293 transitions. [2020-10-09 11:14:55,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-09 11:14:55,425 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-09 11:14:55,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:14:55,426 INFO L225 Difference]: With dead ends: 114 [2020-10-09 11:14:55,426 INFO L226 Difference]: Without dead ends: 109 [2020-10-09 11:14:55,427 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1951, Invalid=4211, Unknown=0, NotChecked=0, Total=6162 [2020-10-09 11:14:55,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-09 11:14:55,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2020-10-09 11:14:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-09 11:14:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-10-09 11:14:55,429 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 33 [2020-10-09 11:14:55,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:14:55,429 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-10-09 11:14:55,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:14:55,429 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-10-09 11:14:55,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:14:55,430 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:14:55,430 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:14:55,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:55,630 INFO L429 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:14:55,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:14:55,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1801619636, now seen corresponding path program 335 times [2020-10-09 11:14:55,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:14:55,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946157090] [2020-10-09 11:14:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:14:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:14:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:56,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946157090] [2020-10-09 11:14:56,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953339918] [2020-10-09 11:14:56,923 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 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:14:56,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-09 11:14:56,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:14:56,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:14:56,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:14:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:14:56,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:14:56,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-09 11:14:56,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395665236] [2020-10-09 11:14:56,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:14:56,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:14:56,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:14:56,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:14:56,997 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 29 states. [2020-10-09 11:14:59,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:14:59,131 INFO L93 Difference]: Finished difference Result 120 states and 279 transitions. [2020-10-09 11:14:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 11:14:59,134 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-09 11:14:59,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:14:59,134 INFO L225 Difference]: With dead ends: 120 [2020-10-09 11:14:59,134 INFO L226 Difference]: Without dead ends: 114 [2020-10-09 11:14:59,135 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=913, Invalid=1949, Unknown=0, NotChecked=0, Total=2862 [2020-10-09 11:14:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-09 11:14:59,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-10-09 11:14:59,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-09 11:14:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 211 transitions. [2020-10-09 11:14:59,137 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 211 transitions. Word has length 33 [2020-10-09 11:14:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:14:59,137 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 211 transitions. [2020-10-09 11:14:59,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:14:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 211 transitions. [2020-10-09 11:14:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:14:59,137 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:14:59,137 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:14:59,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2020-10-09 11:14:59,338 INFO L429 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:14:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:14:59,339 INFO L82 PathProgramCache]: Analyzing trace with hash 2064174256, now seen corresponding path program 336 times [2020-10-09 11:14:59,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:14:59,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898406379] [2020-10-09 11:14:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:14:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:00,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898406379] [2020-10-09 11:15:00,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405318630] [2020-10-09 11:15:00,756 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 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:00,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-09 11:15:00,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:15:00,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:15:00,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:15:00,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:15:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:00,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:15:00,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-09 11:15:00,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508038080] [2020-10-09 11:15:00,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:15:00,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:15:00,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:15:00,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:15:00,920 INFO L87 Difference]: Start difference. First operand 86 states and 211 transitions. Second operand 30 states. [2020-10-09 11:15:03,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:15:03,072 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-10-09 11:15:03,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 11:15:03,076 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-09 11:15:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:15:03,076 INFO L225 Difference]: With dead ends: 146 [2020-10-09 11:15:03,076 INFO L226 Difference]: Without dead ends: 140 [2020-10-09 11:15:03,077 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=922, Invalid=2158, Unknown=0, NotChecked=0, Total=3080 [2020-10-09 11:15:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-09 11:15:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-10-09 11:15:03,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-09 11:15:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 207 transitions. [2020-10-09 11:15:03,079 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 207 transitions. Word has length 33 [2020-10-09 11:15:03,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:15:03,080 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 207 transitions. [2020-10-09 11:15:03,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:15:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 207 transitions. [2020-10-09 11:15:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:15:03,080 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:15:03,080 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:15:03,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:03,281 INFO L429 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:15:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:15:03,282 INFO L82 PathProgramCache]: Analyzing trace with hash -750635858, now seen corresponding path program 337 times [2020-10-09 11:15:03,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:15:03,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359435412] [2020-10-09 11:15:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:15:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:04,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359435412] [2020-10-09 11:15:04,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007926642] [2020-10-09 11:15:04,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:04,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:15:04,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:15:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:04,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:15:04,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-09 11:15:04,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030723235] [2020-10-09 11:15:04,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:15:04,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:15:04,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:15:04,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:15:04,743 INFO L87 Difference]: Start difference. First operand 84 states and 207 transitions. Second operand 29 states. [2020-10-09 11:15:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:15:07,110 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-10-09 11:15:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-09 11:15:07,112 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-09 11:15:07,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:15:07,113 INFO L225 Difference]: With dead ends: 147 [2020-10-09 11:15:07,113 INFO L226 Difference]: Without dead ends: 141 [2020-10-09 11:15:07,114 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=922, Invalid=2270, Unknown=0, NotChecked=0, Total=3192 [2020-10-09 11:15:07,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-09 11:15:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 87. [2020-10-09 11:15:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-09 11:15:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 215 transitions. [2020-10-09 11:15:07,116 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 215 transitions. Word has length 33 [2020-10-09 11:15:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:15:07,116 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 215 transitions. [2020-10-09 11:15:07,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:15:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 215 transitions. [2020-10-09 11:15:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:15:07,117 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:15:07,117 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:15:07,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2020-10-09 11:15:07,318 INFO L429 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:15:07,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:15:07,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1720423186, now seen corresponding path program 338 times [2020-10-09 11:15:07,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:15:07,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858236960] [2020-10-09 11:15:07,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:15:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:08,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858236960] [2020-10-09 11:15:08,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25909336] [2020-10-09 11:15:08,720 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 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:08,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:15:08,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:15:08,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:15:08,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:15:08,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:15:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:08,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:15:08,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-09 11:15:08,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707021302] [2020-10-09 11:15:08,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:15:08,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:15:08,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:15:08,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:15:08,886 INFO L87 Difference]: Start difference. First operand 87 states and 215 transitions. Second operand 30 states. [2020-10-09 11:15:11,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:15:11,299 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2020-10-09 11:15:11,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 11:15:11,302 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-09 11:15:11,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:15:11,303 INFO L225 Difference]: With dead ends: 169 [2020-10-09 11:15:11,303 INFO L226 Difference]: Without dead ends: 163 [2020-10-09 11:15:11,303 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=964, Invalid=2458, Unknown=0, NotChecked=0, Total=3422 [2020-10-09 11:15:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-09 11:15:11,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2020-10-09 11:15:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-09 11:15:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 213 transitions. [2020-10-09 11:15:11,306 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 213 transitions. Word has length 33 [2020-10-09 11:15:11,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:15:11,306 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 213 transitions. [2020-10-09 11:15:11,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:15:11,306 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 213 transitions. [2020-10-09 11:15:11,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:15:11,307 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:15:11,307 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:15:11,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:11,507 INFO L429 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:15:11,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:15:11,508 INFO L82 PathProgramCache]: Analyzing trace with hash 895148688, now seen corresponding path program 339 times [2020-10-09 11:15:11,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:15:11,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552086113] [2020-10-09 11:15:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:15:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:12,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552086113] [2020-10-09 11:15:12,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026295551] [2020-10-09 11:15:12,821 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 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:12,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-09 11:15:12,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:15:12,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:15:12,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:15:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:12,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:15:12,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-09 11:15:12,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81280568] [2020-10-09 11:15:12,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:15:12,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:15:12,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:15:12,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:15:12,921 INFO L87 Difference]: Start difference. First operand 86 states and 213 transitions. Second operand 29 states. [2020-10-09 11:15:15,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:15:15,426 INFO L93 Difference]: Finished difference Result 169 states and 381 transitions. [2020-10-09 11:15:15,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 11:15:15,430 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-09 11:15:15,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:15:15,431 INFO L225 Difference]: With dead ends: 169 [2020-10-09 11:15:15,431 INFO L226 Difference]: Without dead ends: 163 [2020-10-09 11:15:15,431 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=978, Invalid=2562, Unknown=0, NotChecked=0, Total=3540 [2020-10-09 11:15:15,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-09 11:15:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 89. [2020-10-09 11:15:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-09 11:15:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 221 transitions. [2020-10-09 11:15:15,433 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 221 transitions. Word has length 33 [2020-10-09 11:15:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:15:15,433 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 221 transitions. [2020-10-09 11:15:15,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:15:15,433 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 221 transitions. [2020-10-09 11:15:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:15:15,433 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:15:15,434 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:15:15,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:15,634 INFO L429 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:15:15,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:15:15,635 INFO L82 PathProgramCache]: Analyzing trace with hash -143619596, now seen corresponding path program 340 times [2020-10-09 11:15:15,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:15:15,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385431089] [2020-10-09 11:15:15,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:15:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:16,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385431089] [2020-10-09 11:15:16,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110034803] [2020-10-09 11:15:16,970 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 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:17,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:15:17,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:15:17,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:15:17,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:15:17,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:15:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:17,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:15:17,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-09 11:15:17,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712573387] [2020-10-09 11:15:17,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:15:17,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:15:17,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:15:17,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:15:17,144 INFO L87 Difference]: Start difference. First operand 89 states and 221 transitions. Second operand 30 states. [2020-10-09 11:15:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:15:20,086 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2020-10-09 11:15:20,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 11:15:20,092 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-09 11:15:20,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:15:20,092 INFO L225 Difference]: With dead ends: 166 [2020-10-09 11:15:20,092 INFO L226 Difference]: Without dead ends: 160 [2020-10-09 11:15:20,093 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=979, Invalid=2681, Unknown=0, NotChecked=0, Total=3660 [2020-10-09 11:15:20,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-09 11:15:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 88. [2020-10-09 11:15:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-09 11:15:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 219 transitions. [2020-10-09 11:15:20,094 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 219 transitions. Word has length 33 [2020-10-09 11:15:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:15:20,095 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 219 transitions. [2020-10-09 11:15:20,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:15:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 219 transitions. [2020-10-09 11:15:20,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:15:20,095 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:15:20,095 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:15:20,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2020-10-09 11:15:20,302 INFO L429 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:15:20,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:15:20,303 INFO L82 PathProgramCache]: Analyzing trace with hash 271163634, now seen corresponding path program 341 times [2020-10-09 11:15:20,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:15:20,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766611094] [2020-10-09 11:15:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:15:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:21,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766611094] [2020-10-09 11:15:21,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858089852] [2020-10-09 11:15:21,586 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 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:21,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-09 11:15:21,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:15:21,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:15:21,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:15:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:21,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:15:21,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-09 11:15:21,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189184725] [2020-10-09 11:15:21,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:15:21,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:15:21,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:15:21,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:15:21,693 INFO L87 Difference]: Start difference. First operand 88 states and 219 transitions. Second operand 29 states. [2020-10-09 11:15:24,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:15:24,553 INFO L93 Difference]: Finished difference Result 167 states and 379 transitions. [2020-10-09 11:15:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-09 11:15:24,556 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-09 11:15:24,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:15:24,557 INFO L225 Difference]: With dead ends: 167 [2020-10-09 11:15:24,557 INFO L226 Difference]: Without dead ends: 161 [2020-10-09 11:15:24,558 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1008, Invalid=2774, Unknown=0, NotChecked=0, Total=3782 [2020-10-09 11:15:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-09 11:15:24,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 91. [2020-10-09 11:15:24,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-09 11:15:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 227 transitions. [2020-10-09 11:15:24,560 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 227 transitions. Word has length 33 [2020-10-09 11:15:24,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:15:24,560 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 227 transitions. [2020-10-09 11:15:24,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:15:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 227 transitions. [2020-10-09 11:15:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:15:24,561 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:15:24,561 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:15:24,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2020-10-09 11:15:24,762 INFO L429 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:15:24,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:15:24,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1450585770, now seen corresponding path program 342 times [2020-10-09 11:15:24,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:15:24,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484348104] [2020-10-09 11:15:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:15:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:25,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484348104] [2020-10-09 11:15:25,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377453576] [2020-10-09 11:15:25,971 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:26,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-09 11:15:26,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:15:26,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:15:26,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:15:26,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:15:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:26,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:15:26,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-09 11:15:26,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890194160] [2020-10-09 11:15:26,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:15:26,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:15:26,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:15:26,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:15:26,158 INFO L87 Difference]: Start difference. First operand 91 states and 227 transitions. Second operand 30 states. [2020-10-09 11:15:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:15:29,286 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2020-10-09 11:15:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-09 11:15:29,290 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-09 11:15:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:15:29,290 INFO L225 Difference]: With dead ends: 164 [2020-10-09 11:15:29,290 INFO L226 Difference]: Without dead ends: 158 [2020-10-09 11:15:29,291 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1010, Invalid=2896, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 11:15:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-09 11:15:29,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-10-09 11:15:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-09 11:15:29,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 225 transitions. [2020-10-09 11:15:29,294 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 225 transitions. Word has length 33 [2020-10-09 11:15:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:15:29,294 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 225 transitions. [2020-10-09 11:15:29,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:15:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 225 transitions. [2020-10-09 11:15:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:15:29,295 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:15:29,295 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:15:29,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2020-10-09 11:15:29,503 INFO L429 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:15:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:15:29,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1660456916, now seen corresponding path program 343 times [2020-10-09 11:15:29,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:15:29,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488353341] [2020-10-09 11:15:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:15:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:30,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488353341] [2020-10-09 11:15:30,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660186956] [2020-10-09 11:15:30,657 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 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:30,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:15:30,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:15:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:30,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:15:30,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-09 11:15:30,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572376728] [2020-10-09 11:15:30,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:15:30,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:15:30,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:15:30,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:15:30,758 INFO L87 Difference]: Start difference. First operand 90 states and 225 transitions. Second operand 29 states. [2020-10-09 11:15:33,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:15:33,816 INFO L93 Difference]: Finished difference Result 165 states and 377 transitions. [2020-10-09 11:15:33,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-09 11:15:33,821 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-09 11:15:33,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:15:33,821 INFO L225 Difference]: With dead ends: 165 [2020-10-09 11:15:33,821 INFO L226 Difference]: Without dead ends: 159 [2020-10-09 11:15:33,822 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1054, Invalid=2978, Unknown=0, NotChecked=0, Total=4032 [2020-10-09 11:15:33,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-09 11:15:33,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2020-10-09 11:15:33,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-09 11:15:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-10-09 11:15:33,824 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 33 [2020-10-09 11:15:33,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:15:33,824 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-10-09 11:15:33,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:15:33,825 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-10-09 11:15:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:15:33,825 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:15:33,825 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:15:34,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2020-10-09 11:15:34,026 INFO L429 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:15:34,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:15:34,026 INFO L82 PathProgramCache]: Analyzing trace with hash 112298296, now seen corresponding path program 344 times [2020-10-09 11:15:34,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:15:34,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473257625] [2020-10-09 11:15:34,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:15:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:35,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473257625] [2020-10-09 11:15:35,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200525177] [2020-10-09 11:15:35,311 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 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:35,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:15:35,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:15:35,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:15:35,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:15:35,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:15:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:35,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:15:35,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-09 11:15:35,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354883506] [2020-10-09 11:15:35,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:15:35,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:15:35,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:15:35,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:15:35,443 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 30 states. [2020-10-09 11:15:38,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:15:38,800 INFO L93 Difference]: Finished difference Result 162 states and 371 transitions. [2020-10-09 11:15:38,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-09 11:15:38,804 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-09 11:15:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:15:38,804 INFO L225 Difference]: With dead ends: 162 [2020-10-09 11:15:38,804 INFO L226 Difference]: Without dead ends: 156 [2020-10-09 11:15:38,805 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2020-10-09 11:15:38,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-09 11:15:38,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 92. [2020-10-09 11:15:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 11:15:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 231 transitions. [2020-10-09 11:15:38,807 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 231 transitions. Word has length 33 [2020-10-09 11:15:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:15:38,807 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 231 transitions. [2020-10-09 11:15:38,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:15:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 231 transitions. [2020-10-09 11:15:38,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:15:38,808 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:15:38,808 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:15:39,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2020-10-09 11:15:39,008 INFO L429 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:15:39,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:15:39,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1189490890, now seen corresponding path program 345 times [2020-10-09 11:15:39,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:15:39,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779188104] [2020-10-09 11:15:39,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:15:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:40,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779188104] [2020-10-09 11:15:40,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155584054] [2020-10-09 11:15:40,232 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 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:40,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-09 11:15:40,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:15:40,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:15:40,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:15:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:40,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:15:40,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-09 11:15:40,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336658902] [2020-10-09 11:15:40,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:15:40,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:15:40,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:15:40,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:15:40,350 INFO L87 Difference]: Start difference. First operand 92 states and 231 transitions. Second operand 29 states. [2020-10-09 11:15:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:15:43,522 INFO L93 Difference]: Finished difference Result 163 states and 375 transitions. [2020-10-09 11:15:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-09 11:15:43,526 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-09 11:15:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:15:43,526 INFO L225 Difference]: With dead ends: 163 [2020-10-09 11:15:43,526 INFO L226 Difference]: Without dead ends: 157 [2020-10-09 11:15:43,527 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1116, Invalid=3174, Unknown=0, NotChecked=0, Total=4290 [2020-10-09 11:15:43,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-09 11:15:43,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-10-09 11:15:43,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-09 11:15:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 239 transitions. [2020-10-09 11:15:43,529 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 239 transitions. Word has length 33 [2020-10-09 11:15:43,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:15:43,530 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 239 transitions. [2020-10-09 11:15:43,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:15:43,530 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 239 transitions. [2020-10-09 11:15:43,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:15:43,530 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:15:43,530 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:15:43,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2020-10-09 11:15:43,731 INFO L429 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:15:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:15:43,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2000039526, now seen corresponding path program 346 times [2020-10-09 11:15:43,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:15:43,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896185590] [2020-10-09 11:15:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:15:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:44,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896185590] [2020-10-09 11:15:44,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688055492] [2020-10-09 11:15:44,983 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 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:45,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:15:45,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:15:45,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:15:45,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:15:45,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:15:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:45,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:15:45,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-09 11:15:45,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457887264] [2020-10-09 11:15:45,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:15:45,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:15:45,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:15:45,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:15:45,161 INFO L87 Difference]: Start difference. First operand 95 states and 239 transitions. Second operand 30 states. [2020-10-09 11:15:48,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:15:48,710 INFO L93 Difference]: Finished difference Result 160 states and 369 transitions. [2020-10-09 11:15:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-09 11:15:48,714 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-09 11:15:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:15:48,714 INFO L225 Difference]: With dead ends: 160 [2020-10-09 11:15:48,714 INFO L226 Difference]: Without dead ends: 154 [2020-10-09 11:15:48,715 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1120, Invalid=3302, Unknown=0, NotChecked=0, Total=4422 [2020-10-09 11:15:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-09 11:15:48,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 94. [2020-10-09 11:15:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-09 11:15:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 237 transitions. [2020-10-09 11:15:48,722 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 237 transitions. Word has length 33 [2020-10-09 11:15:48,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:15:48,722 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 237 transitions. [2020-10-09 11:15:48,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:15:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 237 transitions. [2020-10-09 11:15:48,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:15:48,722 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:15:48,723 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:15:48,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:48,923 INFO L429 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:15:48,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:15:48,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1947762920, now seen corresponding path program 347 times [2020-10-09 11:15:48,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:15:48,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036957007] [2020-10-09 11:15:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:15:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:50,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036957007] [2020-10-09 11:15:50,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385571656] [2020-10-09 11:15:50,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:50,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-09 11:15:50,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:15:50,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:15:50,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:15:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:50,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:15:50,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-09 11:15:50,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778219729] [2020-10-09 11:15:50,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:15:50,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:15:50,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:15:50,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:15:50,335 INFO L87 Difference]: Start difference. First operand 94 states and 237 transitions. Second operand 29 states. [2020-10-09 11:15:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:15:53,708 INFO L93 Difference]: Finished difference Result 161 states and 373 transitions. [2020-10-09 11:15:53,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-09 11:15:53,713 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-09 11:15:53,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:15:53,714 INFO L225 Difference]: With dead ends: 161 [2020-10-09 11:15:53,714 INFO L226 Difference]: Without dead ends: 155 [2020-10-09 11:15:53,714 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2020-10-09 11:15:53,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-09 11:15:53,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 97. [2020-10-09 11:15:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-09 11:15:53,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 245 transitions. [2020-10-09 11:15:53,716 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 245 transitions. Word has length 33 [2020-10-09 11:15:53,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:15:53,716 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 245 transitions. [2020-10-09 11:15:53,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:15:53,716 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 245 transitions. [2020-10-09 11:15:53,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:15:53,716 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:15:53,717 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:15:53,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2020-10-09 11:15:53,917 INFO L429 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:15:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:15:53,918 INFO L82 PathProgramCache]: Analyzing trace with hash -71513476, now seen corresponding path program 348 times [2020-10-09 11:15:53,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:15:53,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708838937] [2020-10-09 11:15:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:15:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:15:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:55,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708838937] [2020-10-09 11:15:55,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623754404] [2020-10-09 11:15:55,137 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 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:15:55,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-09 11:15:55,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:15:55,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:15:55,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:15:55,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:15:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:15:55,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:15:55,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-09 11:15:55,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183425791] [2020-10-09 11:15:55,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:15:55,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:15:55,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:15:55,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:15:55,337 INFO L87 Difference]: Start difference. First operand 97 states and 245 transitions. Second operand 30 states. [2020-10-09 11:15:59,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:15:59,229 INFO L93 Difference]: Finished difference Result 158 states and 367 transitions. [2020-10-09 11:15:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-09 11:15:59,233 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-09 11:15:59,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:15:59,234 INFO L225 Difference]: With dead ends: 158 [2020-10-09 11:15:59,234 INFO L226 Difference]: Without dead ends: 152 [2020-10-09 11:15:59,234 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1199, Invalid=3493, Unknown=0, NotChecked=0, Total=4692 [2020-10-09 11:15:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-09 11:15:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 96. [2020-10-09 11:15:59,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-09 11:15:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 243 transitions. [2020-10-09 11:15:59,236 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 243 transitions. Word has length 33 [2020-10-09 11:15:59,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:15:59,237 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 243 transitions. [2020-10-09 11:15:59,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:15:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 243 transitions. [2020-10-09 11:15:59,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:15:59,237 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:15:59,237 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:15:59,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2020-10-09 11:15:59,438 INFO L429 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:15:59,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:15:59,439 INFO L82 PathProgramCache]: Analyzing trace with hash 616808314, now seen corresponding path program 349 times [2020-10-09 11:15:59,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:15:59,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585815349] [2020-10-09 11:15:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:15:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:16:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:00,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585815349] [2020-10-09 11:16:00,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931789018] [2020-10-09 11:16:00,615 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 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:16:00,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:16:00,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:16:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:00,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:16:00,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-09 11:16:00,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778640698] [2020-10-09 11:16:00,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:16:00,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:16:00,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:16:00,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:16:00,724 INFO L87 Difference]: Start difference. First operand 96 states and 243 transitions. Second operand 29 states. [2020-10-09 11:16:04,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:16:04,354 INFO L93 Difference]: Finished difference Result 159 states and 371 transitions. [2020-10-09 11:16:04,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-09 11:16:04,358 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-09 11:16:04,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:16:04,358 INFO L225 Difference]: With dead ends: 159 [2020-10-09 11:16:04,359 INFO L226 Difference]: Without dead ends: 153 [2020-10-09 11:16:04,359 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1288, Invalid=3542, Unknown=0, NotChecked=0, Total=4830 [2020-10-09 11:16:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-09 11:16:04,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 99. [2020-10-09 11:16:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 11:16:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 251 transitions. [2020-10-09 11:16:04,362 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 251 transitions. Word has length 33 [2020-10-09 11:16:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:16:04,362 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 251 transitions. [2020-10-09 11:16:04,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:16:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 251 transitions. [2020-10-09 11:16:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:16:04,362 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:16:04,362 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:16:04,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:04,563 INFO L429 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:16:04,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:16:04,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1601999838, now seen corresponding path program 350 times [2020-10-09 11:16:04,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:16:04,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073732702] [2020-10-09 11:16:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:16:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:16:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:05,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073732702] [2020-10-09 11:16:05,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339419423] [2020-10-09 11:16:05,734 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 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:05,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:16:05,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:16:05,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:16:05,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:16:05,871 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:16:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:05,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:16:05,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-09 11:16:05,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235355235] [2020-10-09 11:16:05,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:16:05,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:16:05,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:16:05,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:16:05,919 INFO L87 Difference]: Start difference. First operand 99 states and 251 transitions. Second operand 30 states. [2020-10-09 11:16:10,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:16:10,120 INFO L93 Difference]: Finished difference Result 156 states and 365 transitions. [2020-10-09 11:16:10,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-09 11:16:10,124 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-09 11:16:10,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:16:10,125 INFO L225 Difference]: With dead ends: 156 [2020-10-09 11:16:10,125 INFO L226 Difference]: Without dead ends: 150 [2020-10-09 11:16:10,125 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1294, Invalid=3676, Unknown=0, NotChecked=0, Total=4970 [2020-10-09 11:16:10,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-09 11:16:10,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 98. [2020-10-09 11:16:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 11:16:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 249 transitions. [2020-10-09 11:16:10,127 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 249 transitions. Word has length 33 [2020-10-09 11:16:10,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:16:10,127 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 249 transitions. [2020-10-09 11:16:10,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:16:10,128 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 249 transitions. [2020-10-09 11:16:10,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:16:10,128 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:16:10,128 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:16:10,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:10,329 INFO L429 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:16:10,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:16:10,329 INFO L82 PathProgramCache]: Analyzing trace with hash -15159204, now seen corresponding path program 351 times [2020-10-09 11:16:10,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:16:10,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933979401] [2020-10-09 11:16:10,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:16:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:16:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:11,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933979401] [2020-10-09 11:16:11,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264676615] [2020-10-09 11:16:11,456 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 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:11,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-09 11:16:11,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:16:11,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:16:11,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:16:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:11,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:16:11,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-09 11:16:11,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423608460] [2020-10-09 11:16:11,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:16:11,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:16:11,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:16:11,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:16:11,596 INFO L87 Difference]: Start difference. First operand 98 states and 249 transitions. Second operand 29 states. [2020-10-09 11:16:15,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:16:15,551 INFO L93 Difference]: Finished difference Result 157 states and 369 transitions. [2020-10-09 11:16:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-09 11:16:15,554 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-09 11:16:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:16:15,555 INFO L225 Difference]: With dead ends: 157 [2020-10-09 11:16:15,555 INFO L226 Difference]: Without dead ends: 151 [2020-10-09 11:16:15,556 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1398, Invalid=3714, Unknown=0, NotChecked=0, Total=5112 [2020-10-09 11:16:15,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-09 11:16:15,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 101. [2020-10-09 11:16:15,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-09 11:16:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-10-09 11:16:15,558 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 33 [2020-10-09 11:16:15,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:16:15,558 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-10-09 11:16:15,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:16:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-10-09 11:16:15,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:16:15,559 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:16:15,559 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:16:15,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:15,759 INFO L429 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:16:15,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:16:15,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1241730496, now seen corresponding path program 352 times [2020-10-09 11:16:15,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:16:15,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275149281] [2020-10-09 11:16:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:16:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:16:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:16,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275149281] [2020-10-09 11:16:16,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666903499] [2020-10-09 11:16:16,935 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 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:16,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:16:16,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:16:16,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:16:16,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:16:17,053 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:16:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:17,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:16:17,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-09 11:16:17,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333147623] [2020-10-09 11:16:17,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:16:17,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:16:17,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:16:17,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:16:17,096 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 30 states. [2020-10-09 11:16:21,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:16:21,741 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-10-09 11:16:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-09 11:16:21,744 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-09 11:16:21,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:16:21,744 INFO L225 Difference]: With dead ends: 154 [2020-10-09 11:16:21,744 INFO L226 Difference]: Without dead ends: 148 [2020-10-09 11:16:21,745 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1405, Invalid=3851, Unknown=0, NotChecked=0, Total=5256 [2020-10-09 11:16:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-09 11:16:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 100. [2020-10-09 11:16:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-09 11:16:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-10-09 11:16:21,747 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 33 [2020-10-09 11:16:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:16:21,747 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-10-09 11:16:21,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:16:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-10-09 11:16:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:16:21,747 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:16:21,748 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:16:21,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2020-10-09 11:16:21,948 INFO L429 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:16:21,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:16:21,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1437044290, now seen corresponding path program 353 times [2020-10-09 11:16:21,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:16:21,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655655] [2020-10-09 11:16:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:16:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:16:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:23,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655655] [2020-10-09 11:16:23,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70460042] [2020-10-09 11:16:23,130 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 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:23,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-09 11:16:23,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:16:23,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:16:23,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:16:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:23,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:16:23,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-09 11:16:23,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333715788] [2020-10-09 11:16:23,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:16:23,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:16:23,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:16:23,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:16:23,269 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 29 states. [2020-10-09 11:16:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:16:27,486 INFO L93 Difference]: Finished difference Result 155 states and 367 transitions. [2020-10-09 11:16:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-09 11:16:27,491 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-09 11:16:27,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:16:27,491 INFO L225 Difference]: With dead ends: 155 [2020-10-09 11:16:27,492 INFO L226 Difference]: Without dead ends: 149 [2020-10-09 11:16:27,492 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1524, Invalid=3878, Unknown=0, NotChecked=0, Total=5402 [2020-10-09 11:16:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-09 11:16:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2020-10-09 11:16:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-09 11:16:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 263 transitions. [2020-10-09 11:16:27,494 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 263 transitions. Word has length 33 [2020-10-09 11:16:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:16:27,494 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 263 transitions. [2020-10-09 11:16:27,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:16:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 263 transitions. [2020-10-09 11:16:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:16:27,495 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:16:27,495 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:16:27,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2020-10-09 11:16:27,696 INFO L429 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:16:27,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:16:27,696 INFO L82 PathProgramCache]: Analyzing trace with hash -917301214, now seen corresponding path program 354 times [2020-10-09 11:16:27,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:16:27,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54558724] [2020-10-09 11:16:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:16:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:16:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:28,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54558724] [2020-10-09 11:16:28,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350358115] [2020-10-09 11:16:28,748 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 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:28,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-09 11:16:28,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:16:28,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:16:28,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:16:28,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:16:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:28,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:16:28,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-09 11:16:28,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587434273] [2020-10-09 11:16:28,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:16:28,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:16:28,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:16:28,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:16:28,952 INFO L87 Difference]: Start difference. First operand 103 states and 263 transitions. Second operand 30 states. [2020-10-09 11:16:33,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:16:33,891 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-10-09 11:16:33,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-09 11:16:33,896 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-09 11:16:33,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:16:33,896 INFO L225 Difference]: With dead ends: 152 [2020-10-09 11:16:33,896 INFO L226 Difference]: Without dead ends: 146 [2020-10-09 11:16:33,897 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1532, Invalid=4018, Unknown=0, NotChecked=0, Total=5550 [2020-10-09 11:16:33,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-09 11:16:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2020-10-09 11:16:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-09 11:16:33,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-10-09 11:16:33,900 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 33 [2020-10-09 11:16:33,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:16:33,900 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-10-09 11:16:33,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:16:33,900 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-10-09 11:16:33,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:16:33,900 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:16:33,900 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:16:34,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:34,101 INFO L429 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:16:34,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:16:34,102 INFO L82 PathProgramCache]: Analyzing trace with hash 738010016, now seen corresponding path program 355 times [2020-10-09 11:16:34,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:16:34,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413627651] [2020-10-09 11:16:34,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:16:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:16:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:35,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413627651] [2020-10-09 11:16:35,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959790181] [2020-10-09 11:16:35,157 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 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:16:35,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:16:35,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:16:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:35,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:16:35,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-09 11:16:35,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852725501] [2020-10-09 11:16:35,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:16:35,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:16:35,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:16:35,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:16:35,294 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 29 states. [2020-10-09 11:16:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:16:39,694 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-10-09 11:16:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-09 11:16:39,697 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-09 11:16:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:16:39,698 INFO L225 Difference]: With dead ends: 153 [2020-10-09 11:16:39,698 INFO L226 Difference]: Without dead ends: 147 [2020-10-09 11:16:39,699 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1666, Invalid=4034, Unknown=0, NotChecked=0, Total=5700 [2020-10-09 11:16:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-09 11:16:39,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2020-10-09 11:16:39,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 11:16:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-09 11:16:39,707 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 33 [2020-10-09 11:16:39,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:16:39,707 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-09 11:16:39,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:16:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-09 11:16:39,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:16:39,707 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:16:39,707 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:16:39,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2020-10-09 11:16:39,908 INFO L429 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:16:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:16:39,909 INFO L82 PathProgramCache]: Analyzing trace with hash -982117628, now seen corresponding path program 356 times [2020-10-09 11:16:39,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:16:39,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213575727] [2020-10-09 11:16:39,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:16:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:16:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:41,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213575727] [2020-10-09 11:16:41,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618839478] [2020-10-09 11:16:41,074 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 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:41,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:16:41,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:16:41,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:16:41,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:16:41,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:16:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:41,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:16:41,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-09 11:16:41,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709503787] [2020-10-09 11:16:41,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:16:41,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:16:41,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:16:41,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:16:41,280 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 30 states. [2020-10-09 11:16:46,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:16:46,430 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-10-09 11:16:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-09 11:16:46,435 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-09 11:16:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:16:46,435 INFO L225 Difference]: With dead ends: 150 [2020-10-09 11:16:46,435 INFO L226 Difference]: Without dead ends: 144 [2020-10-09 11:16:46,436 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1675, Invalid=4177, Unknown=0, NotChecked=0, Total=5852 [2020-10-09 11:16:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-09 11:16:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 104. [2020-10-09 11:16:46,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 11:16:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-09 11:16:46,439 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 33 [2020-10-09 11:16:46,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:16:46,439 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-09 11:16:46,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:16:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-09 11:16:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:16:46,439 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:16:46,439 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:16:46,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:46,640 INFO L429 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:16:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:16:46,641 INFO L82 PathProgramCache]: Analyzing trace with hash -511121918, now seen corresponding path program 357 times [2020-10-09 11:16:46,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:16:46,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031260683] [2020-10-09 11:16:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:16:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:16:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:47,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031260683] [2020-10-09 11:16:47,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69262863] [2020-10-09 11:16:47,850 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 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:47,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-09 11:16:47,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:16:47,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:16:47,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:16:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:47,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:16:47,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-09 11:16:47,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274009441] [2020-10-09 11:16:47,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:16:47,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:16:47,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:16:47,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:16:47,994 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 29 states. [2020-10-09 11:16:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:16:52,581 INFO L93 Difference]: Finished difference Result 151 states and 363 transitions. [2020-10-09 11:16:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-09 11:16:52,586 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-09 11:16:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:16:52,586 INFO L225 Difference]: With dead ends: 151 [2020-10-09 11:16:52,586 INFO L226 Difference]: Without dead ends: 145 [2020-10-09 11:16:52,587 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1824, Invalid=4182, Unknown=0, NotChecked=0, Total=6006 [2020-10-09 11:16:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-09 11:16:52,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2020-10-09 11:16:52,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-09 11:16:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-10-09 11:16:52,589 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 33 [2020-10-09 11:16:52,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:16:52,589 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-10-09 11:16:52,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:16:52,590 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-10-09 11:16:52,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:16:52,590 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:16:52,590 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:16:52,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2020-10-09 11:16:52,791 INFO L429 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:16:52,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:16:52,791 INFO L82 PathProgramCache]: Analyzing trace with hash -495034778, now seen corresponding path program 358 times [2020-10-09 11:16:52,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:16:52,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2676556] [2020-10-09 11:16:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:16:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:16:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:53,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2676556] [2020-10-09 11:16:53,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692686805] [2020-10-09 11:16:53,973 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 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:54,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:16:54,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:16:54,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:16:54,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:16:54,121 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:16:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:16:54,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:16:54,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-09 11:16:54,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631928900] [2020-10-09 11:16:54,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:16:54,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:16:54,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:16:54,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:16:54,181 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-10-09 11:16:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:16:59,617 INFO L93 Difference]: Finished difference Result 148 states and 357 transitions. [2020-10-09 11:16:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-09 11:16:59,622 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-09 11:16:59,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:16:59,623 INFO L225 Difference]: With dead ends: 148 [2020-10-09 11:16:59,623 INFO L226 Difference]: Without dead ends: 142 [2020-10-09 11:16:59,624 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1834, Invalid=4328, Unknown=0, NotChecked=0, Total=6162 [2020-10-09 11:16:59,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-09 11:16:59,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 106. [2020-10-09 11:16:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-09 11:16:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-10-09 11:16:59,626 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 33 [2020-10-09 11:16:59,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:16:59,626 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-10-09 11:16:59,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:16:59,626 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-10-09 11:16:59,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:16:59,626 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:16:59,626 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:16:59,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:16:59,827 INFO L429 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:16:59,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:16:59,828 INFO L82 PathProgramCache]: Analyzing trace with hash -494544668, now seen corresponding path program 359 times [2020-10-09 11:16:59,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:16:59,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029016739] [2020-10-09 11:16:59,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:16:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:17:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:00,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029016739] [2020-10-09 11:17:00,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103138685] [2020-10-09 11:17:00,991 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 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:01,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-09 11:17:01,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:17:01,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:17:01,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:17:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:01,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:17:01,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-09 11:17:01,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335552461] [2020-10-09 11:17:01,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-09 11:17:01,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:17:01,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-09 11:17:01,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-10-09 11:17:01,140 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 29 states. [2020-10-09 11:17:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:17:05,927 INFO L93 Difference]: Finished difference Result 168 states and 407 transitions. [2020-10-09 11:17:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-09 11:17:05,932 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-09 11:17:05,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:17:05,932 INFO L225 Difference]: With dead ends: 168 [2020-10-09 11:17:05,933 INFO L226 Difference]: Without dead ends: 162 [2020-10-09 11:17:05,933 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1998, Invalid=4322, Unknown=0, NotChecked=0, Total=6320 [2020-10-09 11:17:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-09 11:17:05,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 112. [2020-10-09 11:17:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-09 11:17:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 293 transitions. [2020-10-09 11:17:05,935 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 293 transitions. Word has length 33 [2020-10-09 11:17:05,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:17:05,936 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 293 transitions. [2020-10-09 11:17:05,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-09 11:17:05,936 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 293 transitions. [2020-10-09 11:17:05,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-09 11:17:05,936 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:17:05,936 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:17:06,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:06,137 INFO L429 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:17:06,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:17:06,138 INFO L82 PathProgramCache]: Analyzing trace with hash -494527928, now seen corresponding path program 360 times [2020-10-09 11:17:06,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:17:06,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115316193] [2020-10-09 11:17:06,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:17:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:17:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:07,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115316193] [2020-10-09 11:17:07,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460120574] [2020-10-09 11:17:07,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:07,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-09 11:17:07,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:17:07,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-09 11:17:07,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:17:07,468 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:17:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:07,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:17:07,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-09 11:17:07,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49713028] [2020-10-09 11:17:07,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:17:07,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:17:07,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:17:07,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:17:07,532 INFO L87 Difference]: Start difference. First operand 112 states and 293 transitions. Second operand 30 states. [2020-10-09 11:17:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:17:13,036 INFO L93 Difference]: Finished difference Result 149 states and 363 transitions. [2020-10-09 11:17:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-09 11:17:13,041 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-09 11:17:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:17:13,041 INFO L225 Difference]: With dead ends: 149 [2020-10-09 11:17:13,041 INFO L226 Difference]: Without dead ends: 141 [2020-10-09 11:17:13,042 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-10-09 11:17:13,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-09 11:17:13,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 109. [2020-10-09 11:17:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-09 11:17:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-10-09 11:17:13,045 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-10-09 11:17:13,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:17:13,045 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-10-09 11:17:13,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:17:13,045 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-10-09 11:17:13,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:17:13,045 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:17:13,045 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:17:13,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:13,246 INFO L429 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:17:13,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:17:13,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1551441143, now seen corresponding path program 361 times [2020-10-09 11:17:13,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:17:13,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004362185] [2020-10-09 11:17:13,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:17:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:17:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:14,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004362185] [2020-10-09 11:17:14,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837842287] [2020-10-09 11:17:14,819 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 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:17:14,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:17:14,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:17:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:14,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:17:14,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-09 11:17:14,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100624807] [2020-10-09 11:17:14,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:17:14,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:17:14,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:17:14,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:17:14,897 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-10-09 11:17:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:17:17,471 INFO L93 Difference]: Finished difference Result 174 states and 411 transitions. [2020-10-09 11:17:17,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 11:17:17,474 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-09 11:17:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:17:17,475 INFO L225 Difference]: With dead ends: 174 [2020-10-09 11:17:17,475 INFO L226 Difference]: Without dead ends: 168 [2020-10-09 11:17:17,476 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=975, Invalid=2217, Unknown=0, NotChecked=0, Total=3192 [2020-10-09 11:17:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-09 11:17:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 111. [2020-10-09 11:17:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-09 11:17:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-09 11:17:17,478 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-09 11:17:17,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:17:17,478 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-09 11:17:17,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:17:17,478 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-09 11:17:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:17:17,478 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:17:17,479 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:17:17,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2020-10-09 11:17:17,679 INFO L429 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:17:17,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:17:17,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1122267739, now seen corresponding path program 362 times [2020-10-09 11:17:17,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:17:17,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764243908] [2020-10-09 11:17:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:17:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:17:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:19,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764243908] [2020-10-09 11:17:19,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725953610] [2020-10-09 11:17:19,374 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 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:19,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:17:19,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:17:19,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:17:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:17:19,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:17:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:19,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:17:19,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-09 11:17:19,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261818270] [2020-10-09 11:17:19,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-09 11:17:19,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:17:19,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-09 11:17:19,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2020-10-09 11:17:19,549 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-09 11:17:22,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:17:22,337 INFO L93 Difference]: Finished difference Result 171 states and 405 transitions. [2020-10-09 11:17:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 11:17:22,341 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-09 11:17:22,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:17:22,342 INFO L225 Difference]: With dead ends: 171 [2020-10-09 11:17:22,342 INFO L226 Difference]: Without dead ends: 165 [2020-10-09 11:17:22,342 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1034, Invalid=2506, Unknown=0, NotChecked=0, Total=3540 [2020-10-09 11:17:22,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-09 11:17:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2020-10-09 11:17:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 11:17:22,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-09 11:17:22,345 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-09 11:17:22,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:17:22,345 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-09 11:17:22,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-09 11:17:22,345 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-09 11:17:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:17:22,345 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:17:22,346 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:17:22,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:22,546 INFO L429 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:17:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:17:22,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1692542375, now seen corresponding path program 363 times [2020-10-09 11:17:22,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:17:22,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505657393] [2020-10-09 11:17:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:17:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:17:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:24,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505657393] [2020-10-09 11:17:24,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179192474] [2020-10-09 11:17:24,156 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 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:24,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-09 11:17:24,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:17:24,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:17:24,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:17:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:24,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:17:24,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-09 11:17:24,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848639880] [2020-10-09 11:17:24,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:17:24,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:17:24,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:17:24,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:17:24,255 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-09 11:17:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:17:27,055 INFO L93 Difference]: Finished difference Result 168 states and 399 transitions. [2020-10-09 11:17:27,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-09 11:17:27,059 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-09 11:17:27,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:17:27,059 INFO L225 Difference]: With dead ends: 168 [2020-10-09 11:17:27,059 INFO L226 Difference]: Without dead ends: 162 [2020-10-09 11:17:27,060 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-09 11:17:27,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-09 11:17:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 111. [2020-10-09 11:17:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-09 11:17:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-09 11:17:27,062 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-09 11:17:27,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:17:27,063 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-09 11:17:27,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:17:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-09 11:17:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:17:27,063 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:17:27,063 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:17:27,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2020-10-09 11:17:27,264 INFO L429 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:17:27,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:17:27,264 INFO L82 PathProgramCache]: Analyzing trace with hash 778516669, now seen corresponding path program 364 times [2020-10-09 11:17:27,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:17:27,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297672877] [2020-10-09 11:17:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:17:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:17:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:28,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297672877] [2020-10-09 11:17:28,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334894531] [2020-10-09 11:17:28,895 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 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:28,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:17:28,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:17:28,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:17:28,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:17:29,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:17:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:29,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:17:29,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-09 11:17:29,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999357722] [2020-10-09 11:17:29,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-09 11:17:29,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:17:29,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-09 11:17:29,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2020-10-09 11:17:29,075 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-09 11:17:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:17:32,269 INFO L93 Difference]: Finished difference Result 167 states and 397 transitions. [2020-10-09 11:17:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 11:17:32,274 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-09 11:17:32,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:17:32,275 INFO L225 Difference]: With dead ends: 167 [2020-10-09 11:17:32,275 INFO L226 Difference]: Without dead ends: 161 [2020-10-09 11:17:32,275 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1040, Invalid=2742, Unknown=0, NotChecked=0, Total=3782 [2020-10-09 11:17:32,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-09 11:17:32,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2020-10-09 11:17:32,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 11:17:32,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-09 11:17:32,278 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-09 11:17:32,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:17:32,278 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-09 11:17:32,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-09 11:17:32,278 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-09 11:17:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:17:32,278 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:17:32,278 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:17:32,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:32,479 INFO L429 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:17:32,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:17:32,480 INFO L82 PathProgramCache]: Analyzing trace with hash -46757829, now seen corresponding path program 365 times [2020-10-09 11:17:32,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:17:32,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963172856] [2020-10-09 11:17:32,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:17:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:17:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:34,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963172856] [2020-10-09 11:17:34,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125750104] [2020-10-09 11:17:34,020 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 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:34,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-09 11:17:34,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:17:34,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:17:34,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:17:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:34,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:17:34,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-09 11:17:34,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609097093] [2020-10-09 11:17:34,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:17:34,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:17:34,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:17:34,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:17:34,130 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-09 11:17:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:17:37,159 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-10-09 11:17:37,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-09 11:17:37,163 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-09 11:17:37,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:17:37,164 INFO L225 Difference]: With dead ends: 164 [2020-10-09 11:17:37,164 INFO L226 Difference]: Without dead ends: 158 [2020-10-09 11:17:37,164 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=989, Invalid=2671, Unknown=0, NotChecked=0, Total=3660 [2020-10-09 11:17:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-09 11:17:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2020-10-09 11:17:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-09 11:17:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-09 11:17:37,167 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-09 11:17:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:17:37,167 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-09 11:17:37,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:17:37,167 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-09 11:17:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:17:37,167 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:17:37,167 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:17:37,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2020-10-09 11:17:37,368 INFO L429 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:17:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:17:37,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1085526113, now seen corresponding path program 366 times [2020-10-09 11:17:37,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:17:37,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486036411] [2020-10-09 11:17:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:17:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:17:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:38,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486036411] [2020-10-09 11:17:38,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450487862] [2020-10-09 11:17:38,875 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 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:38,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-09 11:17:38,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:17:38,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:17:38,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:17:39,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:17:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:39,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:17:39,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-09 11:17:39,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407417719] [2020-10-09 11:17:39,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-09 11:17:39,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:17:39,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-09 11:17:39,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2020-10-09 11:17:39,067 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-09 11:17:42,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:17:42,553 INFO L93 Difference]: Finished difference Result 163 states and 389 transitions. [2020-10-09 11:17:42,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-09 11:17:42,558 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-09 11:17:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:17:42,558 INFO L225 Difference]: With dead ends: 163 [2020-10-09 11:17:42,558 INFO L226 Difference]: Without dead ends: 157 [2020-10-09 11:17:42,559 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1062, Invalid=2970, Unknown=0, NotChecked=0, Total=4032 [2020-10-09 11:17:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-09 11:17:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2020-10-09 11:17:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 11:17:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-09 11:17:42,561 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-09 11:17:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:17:42,561 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-09 11:17:42,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-09 11:17:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-09 11:17:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:17:42,562 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:17:42,562 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:17:42,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2020-10-09 11:17:42,763 INFO L429 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:17:42,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:17:42,763 INFO L82 PathProgramCache]: Analyzing trace with hash -670742883, now seen corresponding path program 367 times [2020-10-09 11:17:42,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:17:42,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755253376] [2020-10-09 11:17:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:17:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:17:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:44,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755253376] [2020-10-09 11:17:44,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517814822] [2020-10-09 11:17:44,183 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 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:17:44,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:17:44,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:17:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:44,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:17:44,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-09 11:17:44,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572462084] [2020-10-09 11:17:44,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:17:44,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:17:44,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:17:44,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:17:44,284 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-09 11:17:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:17:47,553 INFO L93 Difference]: Finished difference Result 160 states and 383 transitions. [2020-10-09 11:17:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-09 11:17:47,557 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-09 11:17:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:17:47,558 INFO L225 Difference]: With dead ends: 160 [2020-10-09 11:17:47,558 INFO L226 Difference]: Without dead ends: 154 [2020-10-09 11:17:47,558 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1020, Invalid=2886, Unknown=0, NotChecked=0, Total=3906 [2020-10-09 11:17:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-09 11:17:47,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 111. [2020-10-09 11:17:47,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-09 11:17:47,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-09 11:17:47,561 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-09 11:17:47,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:17:47,561 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-09 11:17:47,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:17:47,561 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-09 11:17:47,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:17:47,561 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:17:47,561 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:17:47,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:47,762 INFO L429 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:17:47,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:17:47,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1902475009, now seen corresponding path program 368 times [2020-10-09 11:17:47,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:17:47,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116826652] [2020-10-09 11:17:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:17:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:17:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:49,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116826652] [2020-10-09 11:17:49,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30309649] [2020-10-09 11:17:49,232 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 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:49,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:17:49,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:17:49,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:17:49,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:17:49,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:17:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:49,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:17:49,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-09 11:17:49,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710567918] [2020-10-09 11:17:49,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-09 11:17:49,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:17:49,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-09 11:17:49,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2020-10-09 11:17:49,421 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-09 11:17:53,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:17:53,211 INFO L93 Difference]: Finished difference Result 159 states and 381 transitions. [2020-10-09 11:17:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-09 11:17:53,215 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-09 11:17:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:17:53,216 INFO L225 Difference]: With dead ends: 159 [2020-10-09 11:17:53,216 INFO L226 Difference]: Without dead ends: 153 [2020-10-09 11:17:53,217 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1100, Invalid=3190, Unknown=0, NotChecked=0, Total=4290 [2020-10-09 11:17:53,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-09 11:17:53,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 110. [2020-10-09 11:17:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 11:17:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-09 11:17:53,219 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-09 11:17:53,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:17:53,220 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-09 11:17:53,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-09 11:17:53,220 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-09 11:17:53,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:17:53,220 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:17:53,220 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:17:53,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2020-10-09 11:17:53,421 INFO L429 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:17:53,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:17:53,421 INFO L82 PathProgramCache]: Analyzing trace with hash 718550399, now seen corresponding path program 369 times [2020-10-09 11:17:53,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:17:53,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130405010] [2020-10-09 11:17:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:17:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:17:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:54,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130405010] [2020-10-09 11:17:54,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133630453] [2020-10-09 11:17:54,824 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 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:54,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-09 11:17:54,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:17:54,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:17:54,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:17:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:17:54,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:17:54,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-09 11:17:54,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260086909] [2020-10-09 11:17:54,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:17:54,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:17:54,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:17:54,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:17:54,943 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-09 11:17:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:17:58,578 INFO L93 Difference]: Finished difference Result 156 states and 375 transitions. [2020-10-09 11:17:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-09 11:17:58,583 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-09 11:17:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:17:58,583 INFO L225 Difference]: With dead ends: 156 [2020-10-09 11:17:58,583 INFO L226 Difference]: Without dead ends: 150 [2020-10-09 11:17:58,584 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1067, Invalid=3093, Unknown=0, NotChecked=0, Total=4160 [2020-10-09 11:17:58,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-09 11:17:58,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 111. [2020-10-09 11:17:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-09 11:17:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-09 11:17:58,587 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-09 11:17:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:17:58,587 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-09 11:17:58,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:17:58,587 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-09 11:17:58,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:17:58,587 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:17:58,587 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:17:58,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:17:58,788 INFO L429 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:17:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:17:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash -829608221, now seen corresponding path program 370 times [2020-10-09 11:17:58,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:17:58,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003130354] [2020-10-09 11:17:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:17:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:18:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:00,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003130354] [2020-10-09 11:18:00,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455991037] [2020-10-09 11:18:00,113 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 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:00,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:18:00,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:18:00,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:18:00,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:18:00,263 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:18:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:00,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:18:00,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-09 11:18:00,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846338465] [2020-10-09 11:18:00,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-09 11:18:00,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:18:00,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-09 11:18:00,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-10-09 11:18:00,303 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-09 11:18:04,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:18:04,526 INFO L93 Difference]: Finished difference Result 155 states and 373 transitions. [2020-10-09 11:18:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-09 11:18:04,530 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-09 11:18:04,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:18:04,530 INFO L225 Difference]: With dead ends: 155 [2020-10-09 11:18:04,531 INFO L226 Difference]: Without dead ends: 149 [2020-10-09 11:18:04,531 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1154, Invalid=3402, Unknown=0, NotChecked=0, Total=4556 [2020-10-09 11:18:04,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-09 11:18:04,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 110. [2020-10-09 11:18:04,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 11:18:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-09 11:18:04,534 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-09 11:18:04,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:18:04,534 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-09 11:18:04,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-09 11:18:04,534 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-09 11:18:04,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:18:04,534 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:18:04,534 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:18:04,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:04,735 INFO L429 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:18:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:18:04,736 INFO L82 PathProgramCache]: Analyzing trace with hash -2131397407, now seen corresponding path program 371 times [2020-10-09 11:18:04,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:18:04,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847021873] [2020-10-09 11:18:04,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:18:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:18:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:06,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847021873] [2020-10-09 11:18:06,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837991634] [2020-10-09 11:18:06,062 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 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:06,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-09 11:18:06,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:18:06,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:18:06,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:18:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:06,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:18:06,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-09 11:18:06,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819581535] [2020-10-09 11:18:06,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:18:06,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:18:06,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:18:06,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:18:06,190 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-09 11:18:09,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:18:09,965 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-10-09 11:18:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-09 11:18:09,968 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-09 11:18:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:18:09,969 INFO L225 Difference]: With dead ends: 152 [2020-10-09 11:18:09,969 INFO L226 Difference]: Without dead ends: 146 [2020-10-09 11:18:09,970 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1130, Invalid=3292, Unknown=0, NotChecked=0, Total=4422 [2020-10-09 11:18:09,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-09 11:18:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2020-10-09 11:18:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-09 11:18:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-09 11:18:09,972 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-09 11:18:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:18:09,973 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-09 11:18:09,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:18:09,973 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-09 11:18:09,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:18:09,973 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:18:09,973 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:18:10,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:10,174 INFO L429 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:18:10,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:18:10,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1353021253, now seen corresponding path program 372 times [2020-10-09 11:18:10,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:18:10,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638600711] [2020-10-09 11:18:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:18:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:18:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:11,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638600711] [2020-10-09 11:18:11,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846366435] [2020-10-09 11:18:11,502 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 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:11,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-09 11:18:11,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:18:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:18:11,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:18:11,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:18:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:11,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:18:11,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-09 11:18:11,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697682243] [2020-10-09 11:18:11,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-09 11:18:11,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:18:11,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-09 11:18:11,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2020-10-09 11:18:11,701 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-09 11:18:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:18:16,303 INFO L93 Difference]: Finished difference Result 151 states and 365 transitions. [2020-10-09 11:18:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-09 11:18:16,307 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-09 11:18:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:18:16,308 INFO L225 Difference]: With dead ends: 151 [2020-10-09 11:18:16,308 INFO L226 Difference]: Without dead ends: 145 [2020-10-09 11:18:16,309 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1224, Invalid=3606, Unknown=0, NotChecked=0, Total=4830 [2020-10-09 11:18:16,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-09 11:18:16,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2020-10-09 11:18:16,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 11:18:16,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-09 11:18:16,311 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-09 11:18:16,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:18:16,311 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-09 11:18:16,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-09 11:18:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-09 11:18:16,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:18:16,312 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:18:16,312 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:18:16,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:16,513 INFO L429 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:18:16,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:18:16,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1405297859, now seen corresponding path program 373 times [2020-10-09 11:18:16,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:18:16,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317103434] [2020-10-09 11:18:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:18:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:18:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:17,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317103434] [2020-10-09 11:18:17,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972909718] [2020-10-09 11:18:17,767 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 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:18:17,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:18:17,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:18:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:17,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:18:17,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-09 11:18:17,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903101075] [2020-10-09 11:18:17,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:18:17,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:18:17,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:18:17,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:18:17,890 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-09 11:18:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:18:22,000 INFO L93 Difference]: Finished difference Result 148 states and 359 transitions. [2020-10-09 11:18:22,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-09 11:18:22,004 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-09 11:18:22,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:18:22,005 INFO L225 Difference]: With dead ends: 148 [2020-10-09 11:18:22,005 INFO L226 Difference]: Without dead ends: 142 [2020-10-09 11:18:22,006 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1209, Invalid=3483, Unknown=0, NotChecked=0, Total=4692 [2020-10-09 11:18:22,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-09 11:18:22,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2020-10-09 11:18:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-09 11:18:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-09 11:18:22,008 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-09 11:18:22,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:18:22,008 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-09 11:18:22,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:18:22,008 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-09 11:18:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:18:22,009 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:18:22,009 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:18:22,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2020-10-09 11:18:22,210 INFO L429 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:18:22,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:18:22,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1013419993, now seen corresponding path program 374 times [2020-10-09 11:18:22,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:18:22,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114259046] [2020-10-09 11:18:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:18:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:18:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:23,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114259046] [2020-10-09 11:18:23,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951984027] [2020-10-09 11:18:23,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:23,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:18:23,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:18:23,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:18:23,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:18:23,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:18:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:23,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:18:23,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-09 11:18:23,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456877651] [2020-10-09 11:18:23,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-09 11:18:23,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:18:23,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-09 11:18:23,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2020-10-09 11:18:23,787 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-09 11:18:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:18:28,507 INFO L93 Difference]: Finished difference Result 147 states and 357 transitions. [2020-10-09 11:18:28,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-09 11:18:28,511 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-09 11:18:28,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:18:28,511 INFO L225 Difference]: With dead ends: 147 [2020-10-09 11:18:28,511 INFO L226 Difference]: Without dead ends: 141 [2020-10-09 11:18:28,512 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1310, Invalid=3802, Unknown=0, NotChecked=0, Total=5112 [2020-10-09 11:18:28,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-09 11:18:28,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 110. [2020-10-09 11:18:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 11:18:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-09 11:18:28,514 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-09 11:18:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:18:28,515 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-09 11:18:28,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-09 11:18:28,515 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-09 11:18:28,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:18:28,515 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:18:28,515 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:18:28,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2020-10-09 11:18:28,716 INFO L429 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:18:28,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:18:28,717 INFO L82 PathProgramCache]: Analyzing trace with hash -325098203, now seen corresponding path program 375 times [2020-10-09 11:18:28,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:18:28,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253668997] [2020-10-09 11:18:28,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:18:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:18:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:30,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253668997] [2020-10-09 11:18:30,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303279170] [2020-10-09 11:18:30,076 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 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:30,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-09 11:18:30,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:18:30,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:18:30,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:18:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:30,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:18:30,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-09 11:18:30,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302214358] [2020-10-09 11:18:30,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:18:30,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:18:30,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:18:30,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:18:30,217 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-09 11:18:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:18:34,395 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-10-09 11:18:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-09 11:18:34,399 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-09 11:18:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:18:34,400 INFO L225 Difference]: With dead ends: 144 [2020-10-09 11:18:34,400 INFO L226 Difference]: Without dead ends: 138 [2020-10-09 11:18:34,401 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1304, Invalid=3666, Unknown=0, NotChecked=0, Total=4970 [2020-10-09 11:18:34,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-09 11:18:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 111. [2020-10-09 11:18:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-09 11:18:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-09 11:18:34,404 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-09 11:18:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:18:34,404 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-09 11:18:34,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:18:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-09 11:18:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:18:34,405 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:18:34,405 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:18:34,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2020-10-09 11:18:34,614 INFO L429 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:18:34,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:18:34,614 INFO L82 PathProgramCache]: Analyzing trace with hash 660093321, now seen corresponding path program 376 times [2020-10-09 11:18:34,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:18:34,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648633171] [2020-10-09 11:18:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:18:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:18:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:35,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648633171] [2020-10-09 11:18:35,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139300782] [2020-10-09 11:18:35,960 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 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:36,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 11:18:36,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:18:36,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:18:36,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:18:36,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:18:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:36,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:18:36,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-09 11:18:36,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433294575] [2020-10-09 11:18:36,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-09 11:18:36,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:18:36,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-09 11:18:36,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2020-10-09 11:18:36,158 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-09 11:18:41,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:18:41,315 INFO L93 Difference]: Finished difference Result 143 states and 349 transitions. [2020-10-09 11:18:41,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-09 11:18:41,319 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-09 11:18:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:18:41,320 INFO L225 Difference]: With dead ends: 143 [2020-10-09 11:18:41,320 INFO L226 Difference]: Without dead ends: 137 [2020-10-09 11:18:41,320 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1412, Invalid=3990, Unknown=0, NotChecked=0, Total=5402 [2020-10-09 11:18:41,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-09 11:18:41,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 110. [2020-10-09 11:18:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 11:18:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-09 11:18:41,322 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-09 11:18:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:18:41,323 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-09 11:18:41,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-09 11:18:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-09 11:18:41,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:18:41,323 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:18:41,323 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:18:41,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2020-10-09 11:18:41,524 INFO L429 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:18:41,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:18:41,525 INFO L82 PathProgramCache]: Analyzing trace with hash -957065721, now seen corresponding path program 377 times [2020-10-09 11:18:41,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:18:41,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391478362] [2020-10-09 11:18:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:18:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:18:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:42,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391478362] [2020-10-09 11:18:42,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769288412] [2020-10-09 11:18:42,880 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 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:42,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-09 11:18:42,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:18:42,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:18:42,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:18:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:43,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:18:43,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-09 11:18:43,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868927113] [2020-10-09 11:18:43,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:18:43,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:18:43,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:18:43,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:18:43,026 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-09 11:18:47,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:18:47,554 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-10-09 11:18:47,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-09 11:18:47,559 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-09 11:18:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:18:47,560 INFO L225 Difference]: With dead ends: 140 [2020-10-09 11:18:47,560 INFO L226 Difference]: Without dead ends: 134 [2020-10-09 11:18:47,560 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1415, Invalid=3841, Unknown=0, NotChecked=0, Total=5256 [2020-10-09 11:18:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-09 11:18:47,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2020-10-09 11:18:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-09 11:18:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-09 11:18:47,563 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-09 11:18:47,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:18:47,563 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-09 11:18:47,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:18:47,563 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-09 11:18:47,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:18:47,563 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:18:47,564 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:18:47,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2020-10-09 11:18:47,764 INFO L429 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:18:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:18:47,765 INFO L82 PathProgramCache]: Analyzing trace with hash 299823979, now seen corresponding path program 378 times [2020-10-09 11:18:47,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:18:47,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189938640] [2020-10-09 11:18:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:18:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:18:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:49,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189938640] [2020-10-09 11:18:49,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326197394] [2020-10-09 11:18:49,099 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 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:49,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-09 11:18:49,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:18:49,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:18:49,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:18:49,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 11:18:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:49,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:18:49,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-09 11:18:49,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935626973] [2020-10-09 11:18:49,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-09 11:18:49,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:18:49,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-09 11:18:49,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2020-10-09 11:18:49,315 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-09 11:18:53,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:18:53,592 INFO L93 Difference]: Finished difference Result 139 states and 341 transitions. [2020-10-09 11:18:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-09 11:18:53,595 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-09 11:18:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:18:53,595 INFO L225 Difference]: With dead ends: 139 [2020-10-09 11:18:53,595 INFO L226 Difference]: Without dead ends: 133 [2020-10-09 11:18:53,596 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1530, Invalid=4170, Unknown=0, NotChecked=0, Total=5700 [2020-10-09 11:18:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-09 11:18:53,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 110. [2020-10-09 11:18:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 11:18:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-09 11:18:53,598 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-09 11:18:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:18:53,599 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-09 11:18:53,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-09 11:18:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-09 11:18:53,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:18:53,599 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:18:53,599 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:18:53,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2020-10-09 11:18:53,800 INFO L429 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:18:53,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:18:53,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1916016489, now seen corresponding path program 379 times [2020-10-09 11:18:53,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:18:53,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352851075] [2020-10-09 11:18:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:18:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:18:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:54,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352851075] [2020-10-09 11:18:54,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369490395] [2020-10-09 11:18:54,781 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 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:18:54,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:18:54,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 11:18:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:54,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 11:18:54,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-09 11:18:54,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554414360] [2020-10-09 11:18:54,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-09 11:18:54,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 11:18:54,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-09 11:18:54,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-10-09 11:18:54,899 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-09 11:18:58,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 11:18:58,466 INFO L93 Difference]: Finished difference Result 136 states and 335 transitions. [2020-10-09 11:18:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-09 11:18:58,469 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-09 11:18:58,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 11:18:58,469 INFO L225 Difference]: With dead ends: 136 [2020-10-09 11:18:58,469 INFO L226 Difference]: Without dead ends: 130 [2020-10-09 11:18:58,470 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1542, Invalid=4008, Unknown=0, NotChecked=0, Total=5550 [2020-10-09 11:18:58,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-09 11:18:58,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2020-10-09 11:18:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-09 11:18:58,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-09 11:18:58,472 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-09 11:18:58,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 11:18:58,472 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-09 11:18:58,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-09 11:18:58,472 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-09 11:18:58,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-09 11:18:58,473 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 11:18:58,473 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 11:18:58,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:58,673 INFO L429 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 11:18:58,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 11:18:58,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1859207731, now seen corresponding path program 380 times [2020-10-09 11:18:58,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 11:18:58,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505875910] [2020-10-09 11:18:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 11:18:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 11:18:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 11:18:59,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505875910] [2020-10-09 11:18:59,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359249083] [2020-10-09 11:18:59,565 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 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:59,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 11:18:59,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 11:18:59,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-09 11:18:59,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2020-10-09 11:18:59,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 11:18:59,824 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-09 11:18:59,828 WARN L235 ceAbstractionStarter]: Timeout [2020-10-09 11:18:59,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 11:18:59 BasicIcfg [2020-10-09 11:18:59,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 11:18:59,831 INFO L168 Benchmark]: Toolchain (without parser) took 856784.40 ms. Allocated memory was 252.2 MB in the beginning and 219.7 MB in the end (delta: -32.5 MB). Free memory was 207.3 MB in the beginning and 131.2 MB in the end (delta: 76.1 MB). Peak memory consumption was 43.6 MB. Max. memory is 14.2 GB. [2020-10-09 11:18:59,831 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 11:18:59,832 INFO L168 Benchmark]: CACSL2BoogieTranslator took 723.15 ms. Allocated memory was 252.2 MB in the beginning and 314.6 MB in the end (delta: 62.4 MB). Free memory was 207.3 MB in the beginning and 270.5 MB in the end (delta: -63.2 MB). Peak memory consumption was 29.3 MB. Max. memory is 14.2 GB. [2020-10-09 11:18:59,832 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.69 ms. Allocated memory is still 314.6 MB. Free memory was 270.5 MB in the beginning and 268.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 11:18:59,832 INFO L168 Benchmark]: Boogie Preprocessor took 28.63 ms. Allocated memory is still 314.6 MB. Free memory was 268.0 MB in the beginning and 265.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 11:18:59,833 INFO L168 Benchmark]: RCFGBuilder took 418.95 ms. Allocated memory is still 314.6 MB. Free memory was 265.5 MB in the beginning and 246.1 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-09 11:18:59,833 INFO L168 Benchmark]: TraceAbstraction took 855561.67 ms. Allocated memory was 314.6 MB in the beginning and 219.7 MB in the end (delta: -94.9 MB). Free memory was 246.1 MB in the beginning and 131.2 MB in the end (delta: 114.9 MB). Peak memory consumption was 20.1 MB. Max. memory is 14.2 GB. [2020-10-09 11:18:59,835 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 723.15 ms. Allocated memory was 252.2 MB in the beginning and 314.6 MB in the end (delta: 62.4 MB). Free memory was 207.3 MB in the beginning and 270.5 MB in the end (delta: -63.2 MB). Peak memory consumption was 29.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 46.69 ms. Allocated memory is still 314.6 MB. Free memory was 270.5 MB in the beginning and 268.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.63 ms. Allocated memory is still 314.6 MB. Free memory was 268.0 MB in the beginning and 265.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 418.95 ms. Allocated memory is still 314.6 MB. Free memory was 265.5 MB in the beginning and 246.1 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 855561.67 ms. Allocated memory was 314.6 MB in the beginning and 219.7 MB in the end (delta: -94.9 MB). Free memory was 246.1 MB in the beginning and 131.2 MB in the end (delta: 114.9 MB). Peak memory consumption was 20.1 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was analyzing trace of length 35 with TraceHistMax 13,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 855.4s, OverallIterations: 382, TraceHistogramMax: 13, AutomataDifference: 560.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 6134 SDtfs, 25619 SDslu, 46115 SDs, 0 SdLazy, 51796 SolverSat, 36021 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 60.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26654 GetRequests, 8561 SyntacticMatches, 376 SemanticMatches, 17717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232112 ImplicationChecksByTransitivity, 616.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=361, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 381 MinimizatonAttempts, 11907 StatesRemovedByMinimization, 380 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.0s SsaConstructionTime, 9.5s SatisfiabilityAnalysisTime, 190.6s InterpolantComputationTime, 19068 NumberOfCodeBlocks, 19068 NumberOfCodeBlocksAsserted, 2368 NumberOfCheckSat, 18311 ConstructedInterpolants, 0 QuantifiedInterpolants, 2199657 SizeOfPredicates, 6504 NumberOfNonLiveVariables, 56584 ConjunctsInSsa, 8014 ConjunctsInUnsatCore, 757 InterpolantComputations, 5 PerfectInterpolantSequences, 0/57044 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown